diff --git a/crates/compiler/build/Cargo.toml b/crates/compiler/build/Cargo.toml
index 97320d5462..1ef780ec5b 100644
--- a/crates/compiler/build/Cargo.toml
+++ b/crates/compiler/build/Cargo.toml
@@ -25,7 +25,7 @@ roc_gen_wasm = { path = "../gen_wasm" }
 roc_gen_dev = { path = "../gen_dev", default-features = false }
 roc_reporting = { path = "../../reporting" }
 roc_error_macros = { path = "../../error_macros" }
-roc_std = { path = "../../roc_std", default-features = false }
+roc_std = { path = "../../roc_std" }
 roc_utils = { path = "../../utils" }
 bumpalo = { version = "3.8.0", features = ["collections"] }
 libloading = "0.7.1"
diff --git a/crates/compiler/build/src/link.rs b/crates/compiler/build/src/link.rs
index 9e0cc84a67..14654c503a 100644
--- a/crates/compiler/build/src/link.rs
+++ b/crates/compiler/build/src/link.rs
@@ -102,7 +102,7 @@ fn find_wasi_libc_path() -> PathBuf {
     panic!("cannot find `wasi-libc.a`")
 }
 
-#[cfg(not(target_os = "macos"))]
+#[cfg(all(unix, not(target_os = "macos")))]
 #[allow(clippy::too_many_arguments)]
 pub fn build_zig_host_native(
     env_path: &str,
@@ -166,6 +166,62 @@ pub fn build_zig_host_native(
     command.output().unwrap()
 }
 
+#[cfg(windows)]
+#[allow(clippy::too_many_arguments)]
+pub fn build_zig_host_native(
+    env_path: &str,
+    env_home: &str,
+    emit_bin: &str,
+    zig_host_src: &str,
+    zig_str_path: &str,
+    target: &str,
+    opt_level: OptLevel,
+    shared_lib_path: Option<&Path>,
+    _target_valgrind: bool,
+) -> Output {
+    let mut command = Command::new(&zig_executable());
+    command
+        .env_clear()
+        .env("PATH", env_path)
+        .env("HOME", env_home);
+
+    if let Some(shared_lib_path) = shared_lib_path {
+        command.args(&[
+            "build-exe",
+            "-fPIE",
+            shared_lib_path.to_str().unwrap(),
+            &bitcode::get_builtins_host_obj_path(),
+        ]);
+    } else {
+        command.args(&["build-obj", "-fPIC"]);
+    }
+
+    command.args(&[
+        zig_host_src,
+        emit_bin,
+        "--pkg-begin",
+        "str",
+        zig_str_path,
+        "--pkg-end",
+        // include the zig runtime
+        // "-fcompiler-rt", compiler-rt causes segfaults on windows; investigate why
+        // include libc
+        "--library",
+        "c",
+        // cross-compile?
+        "-target",
+        target,
+    ]);
+
+    if matches!(opt_level, OptLevel::Optimize) {
+        command.args(&["-O", "ReleaseSafe"]);
+    } else if matches!(opt_level, OptLevel::Size) {
+        command.args(&["-O", "ReleaseSmall"]);
+    }
+
+    command.output().unwrap()
+}
+
 #[cfg(target_os = "macos")]
 #[allow(clippy::too_many_arguments)]
 pub fn build_zig_host_native(
diff --git a/crates/compiler/gen_dev/Cargo.toml b/crates/compiler/gen_dev/Cargo.toml
index 17e652c01b..ec6f8264c4 100644
--- a/crates/compiler/gen_dev/Cargo.toml
+++ b/crates/compiler/gen_dev/Cargo.toml
@@ -30,7 +30,7 @@ packed_struct = "0.10.0"
 [dev-dependencies]
 roc_can = { path = "../can" }
 roc_parse = { path = "../parse" }
-roc_std = { path = "../../roc_std", default-features = false }
+roc_std = { path = "../../roc_std" }
 bumpalo = { version = "3.8.0", features = ["collections"] }
 capstone = "0.11.0"
 
diff --git a/crates/compiler/gen_llvm/Cargo.toml b/crates/compiler/gen_llvm/Cargo.toml
index a5da18532d..c7a33cb5bb 100644
--- a/crates/compiler/gen_llvm/Cargo.toml
+++ b/crates/compiler/gen_llvm/Cargo.toml
@@ -14,7 +14,7 @@ roc_builtins = { path = "../builtins" }
 roc_error_macros = { path = "../../error_macros" }
 roc_mono = { path = "../mono" }
 roc_target = { path = "../roc_target" }
-roc_std = { path = "../../roc_std", default-features = false }
+roc_std = { path = "../../roc_std" }
 roc_debug_flags = { path = "../debug_flags" }
 roc_region = { path = "../region" }
 morphic_lib = { path = "../../vendor/morphic_lib" }
diff --git a/crates/compiler/gen_llvm/src/llvm/build.rs b/crates/compiler/gen_llvm/src/llvm/build.rs
index 383157a103..f16061e1fe 100644
--- a/crates/compiler/gen_llvm/src/llvm/build.rs
+++ b/crates/compiler/gen_llvm/src/llvm/build.rs
@@ -4243,7 +4243,7 @@ pub fn build_wasm_test_wrapper<'a, 'ctx, 'env>(
         opt_level,
         procedures,
         Some(entry_point),
-        Some(Path::new("/tmp/test.ll")),
+        Some(&std::env::temp_dir().join("test.ll")),
     );
 
     promote_to_wasm_test_wrapper(env, mod_solutions, entry_point.symbol, entry_point.layout)
@@ -4260,7 +4260,7 @@ pub fn build_procedures_return_main<'a, 'ctx, 'env>(
         opt_level,
         procedures,
         Some(entry_point),
-        Some(Path::new("/tmp/test.ll")),
+        Some(&std::env::temp_dir().join("test.ll")),
     );
 
     promote_to_main_function(env, mod_solutions, entry_point.symbol, entry_point.layout)
@@ -4278,7 +4278,7 @@ pub fn build_procedures_expose_expects<'a, 'ctx, 'env>(
         opt_level,
         procedures,
         opt_entry_point,
-        Some(Path::new("/tmp/test.ll")),
+        Some(&std::env::temp_dir().join("test.ll")),
     );
 
     let captures_niche = CapturesNiche::no_niche();
diff --git a/crates/compiler/gen_wasm/Cargo.toml b/crates/compiler/gen_wasm/Cargo.toml
index 4350739601..5415f50f97 100644
--- a/crates/compiler/gen_wasm/Cargo.toml
+++ b/crates/compiler/gen_wasm/Cargo.toml
@@ -13,5 +13,5 @@ roc_collections = { path = "../collections" }
 roc_module = { path = "../module" }
 roc_mono = { path = "../mono" }
 roc_target = { path = "../roc_target" }
-roc_std = { path = "../../roc_std", default-features = false }
+roc_std = { path = "../../roc_std" }
 roc_error_macros = { path = "../../error_macros" }
diff --git a/crates/compiler/gen_wasm/src/lib.rs b/crates/compiler/gen_wasm/src/lib.rs
index 4fa721a08a..4d2236831c 100644
--- a/crates/compiler/gen_wasm/src/lib.rs
+++ b/crates/compiler/gen_wasm/src/lib.rs
@@ -264,3 +264,51 @@ pub const DEBUG_SETTINGS: WasmDebugSettings = WasmDebugSettings {
     keep_test_binary: false && cfg!(debug_assertions),
     skip_dead_code_elim: false && cfg!(debug_assertions),
 };
+
+#[cfg(test)]
+mod dummy_platform_functions {
+    // `cargo test` produces an executable. At least on Windows, this means that extern symbols must be defined. This crate imports roc_std which
+    // defines a bunch of externs, and uses the three below. We provide dummy implementations because these functions are not called.
+    use core::ffi::c_void;
+
+    /// # Safety
+    /// This is only marked unsafe to typecheck without warnings in the rest of the code here.
+    #[no_mangle]
+    pub unsafe extern "C" fn roc_alloc(_size: usize, _alignment: u32) -> *mut c_void {
+        unimplemented!("It is not valid to call roc alloc from within the compiler. Please use the \"platform\" feature if this is a platform.")
+    }
+
+    /// # Safety
+    /// This is only marked unsafe to typecheck without warnings in the rest of the code here.
+    #[no_mangle]
+    pub unsafe extern "C" fn roc_realloc(
+        _ptr: *mut c_void,
+        _new_size: usize,
+        _old_size: usize,
+        _alignment: u32,
+    ) -> *mut c_void {
+        unimplemented!("It is not valid to call roc realloc from within the compiler. Please use the \"platform\" feature if this is a platform.")
+    }
+
+    /// # Safety
+    /// This is only marked unsafe to typecheck without warnings in the rest of the code here.
+    #[no_mangle]
+    pub unsafe extern "C" fn roc_dealloc(_ptr: *mut c_void, _alignment: u32) {
+        unimplemented!("It is not valid to call roc dealloc from within the compiler. Please use the \"platform\" feature if this is a platform.")
+    }
+
+    #[no_mangle]
+    pub unsafe extern "C" fn roc_panic(_c_ptr: *mut c_void, _tag_id: u32) {
+        unimplemented!("It is not valid to call roc panic from within the compiler. Please use the \"platform\" feature if this is a platform.")
+    }
+
+    #[no_mangle]
+    pub fn roc_memcpy(_dst: *mut c_void, _src: *mut c_void, _n: usize) -> *mut c_void {
+        unimplemented!("It is not valid to call roc memcpy from within the compiler. Please use the \"platform\" feature if this is a platform.")
+    }
+
+    #[no_mangle]
+    pub fn roc_memset(_dst: *mut c_void, _c: i32, _n: usize) -> *mut c_void {
+        unimplemented!("It is not valid to call roc memset from within the compiler. Please use the \"platform\" feature if this is a platform.")
+    }
+}
diff --git a/crates/compiler/mono/Cargo.toml b/crates/compiler/mono/Cargo.toml
index f2ee5c0ba3..83650ee24f 100644
--- a/crates/compiler/mono/Cargo.toml
+++ b/crates/compiler/mono/Cargo.toml
@@ -15,7 +15,7 @@ roc_can = { path = "../can" }
 roc_derive_key = { path = "../derive_key" }
 roc_derive = { path = "../derive" }
 roc_late_solve = { path = "../late_solve" }
-roc_std = { path = "../../roc_std", default-features = false }
+roc_std = { path = "../../roc_std" }
 roc_problem = { path = "../problem" }
 roc_builtins = { path = "../builtins" }
 roc_target = { path = "../roc_target" }
diff --git a/crates/compiler/test_gen/Cargo.toml b/crates/compiler/test_gen/Cargo.toml
index fd3d97d1c0..c3931dbda8 100644
--- a/crates/compiler/test_gen/Cargo.toml
+++ b/crates/compiler/test_gen/Cargo.toml
@@ -34,7 +34,7 @@ roc_parse = { path = "../parse" }
 roc_build = { path = "../build", features = ["target-aarch64", "target-x86_64", "target-wasm32"]  }
 roc_target = { path = "../roc_target" }
 roc_error_macros = { path = "../../error_macros" }
-roc_std = { path = "../../roc_std" }
+roc_std = { path = "../../roc_std"  }
 roc_debug_flags = {path="../debug_flags"}
 bumpalo = { version = "3.8.0", features = ["collections"] }
 either = "1.6.1"
diff --git a/crates/compiler/test_gen/build.rs b/crates/compiler/test_gen/build.rs
index 66879ab115..94e1577d15 100644
--- a/crates/compiler/test_gen/build.rs
+++ b/crates/compiler/test_gen/build.rs
@@ -17,6 +17,14 @@ fn main() {
     }
 }
 
+const fn object_file_extension() -> &'static str {
+    if cfg!(windows) {
+        "obj"
+    } else {
+        "o"
+    }
+}
+
 fn build_wasm_linking_test_host() {
     let host_source_path = PathBuf::from("src")
         .join("helpers")
@@ -53,15 +61,8 @@ fn build_wasm_linking_test_host() {
         &format!("-femit-bin={}", host_wasm),
     ]);
 
-    let host_obj_path = PathBuf::from("build").join("wasm_linking_test_host.o");
-    let host_obj = host_obj_path.to_str().unwrap();
-    run_zig(&[
-        "build-obj",
-        host_source,
-        &format!("-femit-bin={}", &host_obj),
-    ]);
-
-    let import_obj_path = PathBuf::from("build").join("wasm_linking_host_imports.o");
+    let mut import_obj_path = PathBuf::from("build").join("wasm_linking_host_imports");
+    import_obj_path.set_extension(object_file_extension());
     let import_obj = import_obj_path.to_str().unwrap();
     run_zig(&[
         "build-obj",
@@ -71,9 +72,15 @@ fn build_wasm_linking_test_host() {
 
     run_zig(&[
         "build-exe",
-        host_obj,
+        host_source,
         import_obj,
         &format!("-femit-bin={}", host_native),
+        #[cfg(windows)]
+        "--subsystem",
+        #[cfg(windows)]
+        "console",
+        #[cfg(windows)]
+        "-lc",
     ]);
 }
 
@@ -143,7 +150,12 @@ fn run_zig(args: &[&str]) {
     println!("{} {}", zig, args.join(" "));
     let output = Command::new(&zig).args(args).output().unwrap();
 
-    assert!(output.status.success(), "{:#?}", output);
+    if !output.status.success() {
+        eprintln!("stdout:\n{}", String::from_utf8_lossy(&output.stdout));
+        eprintln!("stderr:\n{}", String::from_utf8_lossy(&output.stderr));
+        panic!("zig call failed with status {:?}", output.status);
+    }
+
     assert!(output.stdout.is_empty(), "{:#?}", output);
     assert!(output.stderr.is_empty(), "{:#?}", output);
 }
diff --git a/crates/compiler/test_gen/src/helpers/llvm.rs b/crates/compiler/test_gen/src/helpers/llvm.rs
index ea37fd6507..eab7f79c7b 100644
--- a/crates/compiler/test_gen/src/helpers/llvm.rs
+++ b/crates/compiler/test_gen/src/helpers/llvm.rs
@@ -273,11 +273,12 @@ fn create_llvm_module<'a>(
 
     // Verify the module
     if let Err(errors) = env.module.verify() {
-        let path = "/tmp/test.ll";
-        env.module.print_to_file(path).unwrap();
+        let path = std::env::temp_dir().join("test.ll");
+        env.module.print_to_file(&path).unwrap();
         panic!(
-            "Errors defining module:\n\n{}\n\nI have written the full module to `{path}`",
-            errors.to_string()
+            "Errors defining module:\n\n{}\n\nI have written the full module to `{:?}`",
+            errors.to_string(),
+            path
         );
     }
 
diff --git a/crates/compiler/test_mono/generated/encode_derived_nested_record_string.txt b/crates/compiler/test_mono/generated/encode_derived_nested_record_string.txt
index 995f6b5fe6..98e270cb45 100644
--- a/crates/compiler/test_mono/generated/encode_derived_nested_record_string.txt
+++ b/crates/compiler/test_mono/generated/encode_derived_nested_record_string.txt
@@ -11,7 +11,7 @@ procedure #Derived.2 (#Derived.3, #Derived.4, #Attr.12):
     let #Derived_gen.8 : {Str} = CallByName #Derived.5 #Derived.1;
     let #Derived_gen.6 : {Str, {Str}} = Struct {#Derived_gen.7, #Derived_gen.8};
     let #Derived_gen.5 : List {Str, {Str}} = Array [#Derived_gen.6];
-    let #Derived_gen.4 : {List {Str, {Str}}} = CallByName Json.19 #Derived_gen.5;
+    let #Derived_gen.4 : {List {Str, {Str}}} = CallByName Json.20 #Derived_gen.5;
     let #Derived_gen.3 : List U8 = CallByName Encode.23 #Derived.3 #Derived_gen.4 #Derived.4;
     ret #Derived_gen.3;
 
@@ -25,10 +25,10 @@ procedure #Derived.7 (#Derived.8, #Derived.9, #Attr.12):
     inc #Derived.6;
     dec #Attr.12;
     let #Derived_gen.21 : Str = "b";
-    let #Derived_gen.22 : {Str} = CallByName Json.17 #Derived.6;
+    let #Derived_gen.22 : {Str} = CallByName Json.18 #Derived.6;
     let #Derived_gen.20 : {Str, {Str}} = Struct {#Derived_gen.21, #Derived_gen.22};
     let #Derived_gen.19 : List {Str, {Str}} = Array [#Derived_gen.20];
-    let #Derived_gen.18 : {List {Str, {Str}}} = CallByName Json.19 #Derived_gen.19;
+    let #Derived_gen.18 : {List {Str, {Str}}} = CallByName Json.20 #Derived_gen.19;
     let #Derived_gen.17 : List U8 = CallByName Encode.23 #Derived.8 #Derived_gen.18 #Derived.9;
     ret #Derived_gen.17;
 
@@ -52,7 +52,7 @@ procedure Encode.23 (Encode.94, Encode.102, Encode.96):
     ret Encode.106;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.113 : List U8 = CallByName Json.81 Encode.94 Encode.96 Encode.102;
+    let Encode.113 : List U8 = CallByName Json.103 Encode.94 Encode.96 Encode.102;
     ret Encode.113;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
@@ -60,11 +60,11 @@ procedure Encode.23 (Encode.94, Encode.102, Encode.96):
     ret Encode.115;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.125 : List U8 = CallByName Json.81 Encode.94 Encode.96 Encode.102;
+    let Encode.125 : List U8 = CallByName Json.103 Encode.94 Encode.96 Encode.102;
     ret Encode.125;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.128 : List U8 = CallByName Json.65 Encode.94 Encode.96 Encode.102;
+    let Encode.128 : List U8 = CallByName Json.87 Encode.94 Encode.96 Encode.102;
     ret Encode.128;
 
 procedure Encode.25 (Encode.100, Encode.101):
@@ -74,165 +74,165 @@ procedure Encode.25 (Encode.100, Encode.101):
     ret Encode.103;
 
 procedure Json.1 ():
-    let Json.106 : {} = Struct {};
-    ret Json.106;
+    let Json.318 : {} = Struct {};
+    ret Json.318;
 
-procedure Json.17 (Json.64):
-    let Json.153 : {Str} = Struct {Json.64};
-    let Json.152 : {Str} = CallByName Encode.22 Json.153;
-    ret Json.152;
-
-procedure Json.19 (Json.80):
-    let Json.108 : {List {Str, {Str}}} = Struct {Json.80};
-    let Json.107 : {List {Str, {Str}}} = CallByName Encode.22 Json.108;
-    ret Json.107;
-
-procedure Json.19 (Json.80):
-    let Json.150 : {List {Str, {Str}}} = Struct {Json.80};
-    let Json.149 : {List {Str, {Str}}} = CallByName Encode.22 Json.150;
-    ret Json.149;
-
-procedure Json.65 (Json.66, Json.154, #Attr.12):
-    let Json.64 : Str = StructAtIndex 0 #Attr.12;
-    inc Json.64;
+procedure Json.103 (Json.104, Json.321, #Attr.12):
+    let Json.102 : List {Str, {Str}} = StructAtIndex 0 #Attr.12;
+    inc Json.102;
     dec #Attr.12;
-    let Json.194 : I32 = 34i64;
-    let Json.193 : U8 = CallByName Num.123 Json.194;
-    let Json.191 : List U8 = CallByName List.4 Json.66 Json.193;
-    let Json.192 : List U8 = CallByName Str.12 Json.64;
-    let Json.188 : List U8 = CallByName List.8 Json.191 Json.192;
-    let Json.190 : I32 = 34i64;
-    let Json.189 : U8 = CallByName Num.123 Json.190;
-    let Json.187 : List U8 = CallByName List.4 Json.188 Json.189;
-    ret Json.187;
+    let Json.354 : I32 = 123i64;
+    let Json.353 : U8 = CallByName Num.123 Json.354;
+    let Json.106 : List U8 = CallByName List.4 Json.104 Json.353;
+    let Json.352 : U64 = CallByName List.6 Json.102;
+    let Json.329 : {List U8, U64} = Struct {Json.106, Json.352};
+    let Json.330 : {} = Struct {};
+    let Json.328 : {List U8, U64} = CallByName List.18 Json.102 Json.329 Json.330;
+    dec Json.102;
+    let Json.108 : List U8 = StructAtIndex 0 Json.328;
+    inc Json.108;
+    dec Json.328;
+    let Json.327 : I32 = 125i64;
+    let Json.326 : U8 = CallByName Num.123 Json.327;
+    let Json.325 : List U8 = CallByName List.4 Json.108 Json.326;
+    ret Json.325;
 
-procedure Json.81 (Json.82, Json.109, #Attr.12):
-    let Json.80 : List {Str, {Str}} = StructAtIndex 0 #Attr.12;
-    inc Json.80;
+procedure Json.103 (Json.104, Json.321, #Attr.12):
+    let Json.102 : List {Str, {Str}} = StructAtIndex 0 #Attr.12;
+    inc Json.102;
     dec #Attr.12;
-    let Json.142 : I32 = 123i64;
-    let Json.141 : U8 = CallByName Num.123 Json.142;
-    let Json.84 : List U8 = CallByName List.4 Json.82 Json.141;
-    let Json.140 : U64 = CallByName List.6 Json.80;
-    let Json.117 : {List U8, U64} = Struct {Json.84, Json.140};
-    let Json.118 : {} = Struct {};
-    let Json.116 : {List U8, U64} = CallByName List.18 Json.80 Json.117 Json.118;
-    dec Json.80;
-    let Json.86 : List U8 = StructAtIndex 0 Json.116;
-    inc Json.86;
-    dec Json.116;
-    let Json.115 : I32 = 125i64;
-    let Json.114 : U8 = CallByName Num.123 Json.115;
-    let Json.113 : List U8 = CallByName List.4 Json.86 Json.114;
-    ret Json.113;
+    let Json.397 : I32 = 123i64;
+    let Json.396 : U8 = CallByName Num.123 Json.397;
+    let Json.106 : List U8 = CallByName List.4 Json.104 Json.396;
+    let Json.395 : U64 = CallByName List.6 Json.102;
+    let Json.372 : {List U8, U64} = Struct {Json.106, Json.395};
+    let Json.373 : {} = Struct {};
+    let Json.371 : {List U8, U64} = CallByName List.18 Json.102 Json.372 Json.373;
+    dec Json.102;
+    let Json.108 : List U8 = StructAtIndex 0 Json.371;
+    inc Json.108;
+    dec Json.371;
+    let Json.370 : I32 = 125i64;
+    let Json.369 : U8 = CallByName Num.123 Json.370;
+    let Json.368 : List U8 = CallByName List.4 Json.108 Json.369;
+    ret Json.368;
 
-procedure Json.81 (Json.82, Json.109, #Attr.12):
-    let Json.80 : List {Str, {Str}} = StructAtIndex 0 #Attr.12;
-    inc Json.80;
-    dec #Attr.12;
-    let Json.185 : I32 = 123i64;
-    let Json.184 : U8 = CallByName Num.123 Json.185;
-    let Json.84 : List U8 = CallByName List.4 Json.82 Json.184;
-    let Json.183 : U64 = CallByName List.6 Json.80;
-    let Json.160 : {List U8, U64} = Struct {Json.84, Json.183};
-    let Json.161 : {} = Struct {};
-    let Json.159 : {List U8, U64} = CallByName List.18 Json.80 Json.160 Json.161;
-    dec Json.80;
-    let Json.86 : List U8 = StructAtIndex 0 Json.159;
-    inc Json.86;
-    dec Json.159;
-    let Json.158 : I32 = 125i64;
-    let Json.157 : U8 = CallByName Num.123 Json.158;
-    let Json.156 : List U8 = CallByName List.4 Json.86 Json.157;
-    ret Json.156;
-
-procedure Json.83 (Json.111, Json.112):
-    let Json.89 : Str = StructAtIndex 0 Json.112;
-    inc Json.89;
-    let Json.90 : {Str} = StructAtIndex 1 Json.112;
-    inc Json.90;
-    dec Json.112;
-    let Json.87 : List U8 = StructAtIndex 0 Json.111;
-    inc Json.87;
-    let Json.88 : U64 = StructAtIndex 1 Json.111;
-    dec Json.111;
-    let Json.139 : I32 = 34i64;
-    let Json.138 : U8 = CallByName Num.123 Json.139;
-    let Json.136 : List U8 = CallByName List.4 Json.87 Json.138;
-    let Json.137 : List U8 = CallByName Str.12 Json.89;
-    let Json.133 : List U8 = CallByName List.8 Json.136 Json.137;
-    let Json.135 : I32 = 34i64;
-    let Json.134 : U8 = CallByName Num.123 Json.135;
-    let Json.130 : List U8 = CallByName List.4 Json.133 Json.134;
-    let Json.132 : I32 = 58i64;
-    let Json.131 : U8 = CallByName Num.123 Json.132;
-    let Json.128 : List U8 = CallByName List.4 Json.130 Json.131;
-    let Json.129 : {} = Struct {};
-    let Json.91 : List U8 = CallByName Encode.23 Json.128 Json.90 Json.129;
-    joinpoint Json.123 Json.92:
-        let Json.121 : U64 = 1i64;
-        let Json.120 : U64 = CallByName Num.20 Json.88 Json.121;
-        let Json.119 : {List U8, U64} = Struct {Json.92, Json.120};
-        ret Json.119;
+procedure Json.105 (Json.323, Json.324):
+    let Json.111 : Str = StructAtIndex 0 Json.324;
+    inc Json.111;
+    let Json.112 : {Str} = StructAtIndex 1 Json.324;
+    inc Json.112;
+    dec Json.324;
+    let Json.109 : List U8 = StructAtIndex 0 Json.323;
+    inc Json.109;
+    let Json.110 : U64 = StructAtIndex 1 Json.323;
+    dec Json.323;
+    let Json.351 : I32 = 34i64;
+    let Json.350 : U8 = CallByName Num.123 Json.351;
+    let Json.348 : List U8 = CallByName List.4 Json.109 Json.350;
+    let Json.349 : List U8 = CallByName Str.12 Json.111;
+    let Json.345 : List U8 = CallByName List.8 Json.348 Json.349;
+    let Json.347 : I32 = 34i64;
+    let Json.346 : U8 = CallByName Num.123 Json.347;
+    let Json.342 : List U8 = CallByName List.4 Json.345 Json.346;
+    let Json.344 : I32 = 58i64;
+    let Json.343 : U8 = CallByName Num.123 Json.344;
+    let Json.340 : List U8 = CallByName List.4 Json.342 Json.343;
+    let Json.341 : {} = Struct {};
+    let Json.113 : List U8 = CallByName Encode.23 Json.340 Json.112 Json.341;
+    joinpoint Json.335 Json.114:
+        let Json.333 : U64 = 1i64;
+        let Json.332 : U64 = CallByName Num.20 Json.110 Json.333;
+        let Json.331 : {List U8, U64} = Struct {Json.114, Json.332};
+        ret Json.331;
     in
-    let Json.127 : U64 = 1i64;
-    let Json.124 : Int1 = CallByName Num.24 Json.88 Json.127;
-    if Json.124 then
-        let Json.126 : I32 = 44i64;
-        let Json.125 : U8 = CallByName Num.123 Json.126;
-        let Json.122 : List U8 = CallByName List.4 Json.91 Json.125;
-        jump Json.123 Json.122;
+    let Json.339 : U64 = 1i64;
+    let Json.336 : Int1 = CallByName Num.24 Json.110 Json.339;
+    if Json.336 then
+        let Json.338 : I32 = 44i64;
+        let Json.337 : U8 = CallByName Num.123 Json.338;
+        let Json.334 : List U8 = CallByName List.4 Json.113 Json.337;
+        jump Json.335 Json.334;
     else
-        jump Json.123 Json.91;
+        jump Json.335 Json.113;
 
-procedure Json.83 (Json.111, Json.112):
-    let Json.89 : Str = StructAtIndex 0 Json.112;
-    inc Json.89;
-    let Json.90 : {Str} = StructAtIndex 1 Json.112;
-    inc Json.90;
-    dec Json.112;
-    let Json.87 : List U8 = StructAtIndex 0 Json.111;
-    inc Json.87;
-    let Json.88 : U64 = StructAtIndex 1 Json.111;
-    dec Json.111;
-    let Json.182 : I32 = 34i64;
-    let Json.181 : U8 = CallByName Num.123 Json.182;
-    let Json.179 : List U8 = CallByName List.4 Json.87 Json.181;
-    let Json.180 : List U8 = CallByName Str.12 Json.89;
-    let Json.176 : List U8 = CallByName List.8 Json.179 Json.180;
-    let Json.178 : I32 = 34i64;
-    let Json.177 : U8 = CallByName Num.123 Json.178;
-    let Json.173 : List U8 = CallByName List.4 Json.176 Json.177;
-    let Json.175 : I32 = 58i64;
-    let Json.174 : U8 = CallByName Num.123 Json.175;
-    let Json.171 : List U8 = CallByName List.4 Json.173 Json.174;
-    let Json.172 : {} = Struct {};
-    let Json.91 : List U8 = CallByName Encode.23 Json.171 Json.90 Json.172;
-    joinpoint Json.166 Json.92:
-        let Json.164 : U64 = 1i64;
-        let Json.163 : U64 = CallByName Num.20 Json.88 Json.164;
-        let Json.162 : {List U8, U64} = Struct {Json.92, Json.163};
-        ret Json.162;
+procedure Json.105 (Json.323, Json.324):
+    let Json.111 : Str = StructAtIndex 0 Json.324;
+    inc Json.111;
+    let Json.112 : {Str} = StructAtIndex 1 Json.324;
+    inc Json.112;
+    dec Json.324;
+    let Json.109 : List U8 = StructAtIndex 0 Json.323;
+    inc Json.109;
+    let Json.110 : U64 = StructAtIndex 1 Json.323;
+    dec Json.323;
+    let Json.394 : I32 = 34i64;
+    let Json.393 : U8 = CallByName Num.123 Json.394;
+    let Json.391 : List U8 = CallByName List.4 Json.109 Json.393;
+    let Json.392 : List U8 = CallByName Str.12 Json.111;
+    let Json.388 : List U8 = CallByName List.8 Json.391 Json.392;
+    let Json.390 : I32 = 34i64;
+    let Json.389 : U8 = CallByName Num.123 Json.390;
+    let Json.385 : List U8 = CallByName List.4 Json.388 Json.389;
+    let Json.387 : I32 = 58i64;
+    let Json.386 : U8 = CallByName Num.123 Json.387;
+    let Json.383 : List U8 = CallByName List.4 Json.385 Json.386;
+    let Json.384 : {} = Struct {};
+    let Json.113 : List U8 = CallByName Encode.23 Json.383 Json.112 Json.384;
+    joinpoint Json.378 Json.114:
+        let Json.376 : U64 = 1i64;
+        let Json.375 : U64 = CallByName Num.20 Json.110 Json.376;
+        let Json.374 : {List U8, U64} = Struct {Json.114, Json.375};
+        ret Json.374;
     in
-    let Json.170 : U64 = 1i64;
-    let Json.167 : Int1 = CallByName Num.24 Json.88 Json.170;
-    if Json.167 then
-        let Json.169 : I32 = 44i64;
-        let Json.168 : U8 = CallByName Num.123 Json.169;
-        let Json.165 : List U8 = CallByName List.4 Json.91 Json.168;
-        jump Json.166 Json.165;
+    let Json.382 : U64 = 1i64;
+    let Json.379 : Int1 = CallByName Num.24 Json.110 Json.382;
+    if Json.379 then
+        let Json.381 : I32 = 44i64;
+        let Json.380 : U8 = CallByName Num.123 Json.381;
+        let Json.377 : List U8 = CallByName List.4 Json.113 Json.380;
+        jump Json.378 Json.377;
     else
-        jump Json.166 Json.91;
+        jump Json.378 Json.113;
+
+procedure Json.18 (Json.86):
+    let Json.365 : {Str} = Struct {Json.86};
+    let Json.364 : {Str} = CallByName Encode.22 Json.365;
+    ret Json.364;
+
+procedure Json.20 (Json.102):
+    let Json.320 : {List {Str, {Str}}} = Struct {Json.102};
+    let Json.319 : {List {Str, {Str}}} = CallByName Encode.22 Json.320;
+    ret Json.319;
+
+procedure Json.20 (Json.102):
+    let Json.362 : {List {Str, {Str}}} = Struct {Json.102};
+    let Json.361 : {List {Str, {Str}}} = CallByName Encode.22 Json.362;
+    ret Json.361;
+
+procedure Json.87 (Json.88, Json.366, #Attr.12):
+    let Json.86 : Str = StructAtIndex 0 #Attr.12;
+    inc Json.86;
+    dec #Attr.12;
+    let Json.406 : I32 = 34i64;
+    let Json.405 : U8 = CallByName Num.123 Json.406;
+    let Json.403 : List U8 = CallByName List.4 Json.88 Json.405;
+    let Json.404 : List U8 = CallByName Str.12 Json.86;
+    let Json.400 : List U8 = CallByName List.8 Json.403 Json.404;
+    let Json.402 : I32 = 34i64;
+    let Json.401 : U8 = CallByName Num.123 Json.402;
+    let Json.399 : List U8 = CallByName List.4 Json.400 Json.401;
+    ret Json.399;
 
 procedure List.133 (List.134, List.135, #Attr.12):
     let List.132 : {} = StructAtIndex 0 #Attr.12;
-    let List.434 : {List U8, U64} = CallByName Json.83 List.134 List.135;
+    let List.434 : {List U8, U64} = CallByName Json.105 List.134 List.135;
     let List.433 : [C [], C {List U8, U64}] = TagId(1) List.434;
     ret List.433;
 
 procedure List.133 (List.134, List.135, #Attr.12):
     let List.132 : {} = StructAtIndex 0 #Attr.12;
-    let List.515 : {List U8, U64} = CallByName Json.83 List.134 List.135;
+    let List.515 : {List U8, U64} = CallByName Json.105 List.134 List.135;
     let List.514 : [C [], C {List U8, U64}] = TagId(1) List.515;
     ret List.514;
 
diff --git a/crates/compiler/test_mono/generated/encode_derived_record_one_field_string.txt b/crates/compiler/test_mono/generated/encode_derived_record_one_field_string.txt
index 8563241976..fda4fb2049 100644
--- a/crates/compiler/test_mono/generated/encode_derived_record_one_field_string.txt
+++ b/crates/compiler/test_mono/generated/encode_derived_record_one_field_string.txt
@@ -8,10 +8,10 @@ procedure #Derived.2 (#Derived.3, #Derived.4, #Attr.12):
     inc #Derived.1;
     dec #Attr.12;
     let #Derived_gen.7 : Str = "a";
-    let #Derived_gen.8 : {Str} = CallByName Json.17 #Derived.1;
+    let #Derived_gen.8 : {Str} = CallByName Json.18 #Derived.1;
     let #Derived_gen.6 : {Str, {Str}} = Struct {#Derived_gen.7, #Derived_gen.8};
     let #Derived_gen.5 : List {Str, {Str}} = Array [#Derived_gen.6];
-    let #Derived_gen.4 : {List {Str, {Str}}} = CallByName Json.19 #Derived_gen.5;
+    let #Derived_gen.4 : {List {Str, {Str}}} = CallByName Json.20 #Derived_gen.5;
     let #Derived_gen.3 : List U8 = CallByName Encode.23 #Derived.3 #Derived_gen.4 #Derived.4;
     ret #Derived_gen.3;
 
@@ -29,11 +29,11 @@ procedure Encode.23 (Encode.94, Encode.102, Encode.96):
     ret Encode.106;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.113 : List U8 = CallByName Json.81 Encode.94 Encode.96 Encode.102;
+    let Encode.113 : List U8 = CallByName Json.103 Encode.94 Encode.96 Encode.102;
     ret Encode.113;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.116 : List U8 = CallByName Json.65 Encode.94 Encode.96 Encode.102;
+    let Encode.116 : List U8 = CallByName Json.87 Encode.94 Encode.96 Encode.102;
     ret Encode.116;
 
 procedure Encode.25 (Encode.100, Encode.101):
@@ -43,95 +43,95 @@ procedure Encode.25 (Encode.100, Encode.101):
     ret Encode.103;
 
 procedure Json.1 ():
-    let Json.106 : {} = Struct {};
-    ret Json.106;
+    let Json.318 : {} = Struct {};
+    ret Json.318;
 
-procedure Json.17 (Json.64):
-    let Json.111 : {Str} = Struct {Json.64};
-    let Json.110 : {Str} = CallByName Encode.22 Json.111;
-    ret Json.110;
-
-procedure Json.19 (Json.80):
-    let Json.108 : {List {Str, {Str}}} = Struct {Json.80};
-    let Json.107 : {List {Str, {Str}}} = CallByName Encode.22 Json.108;
-    ret Json.107;
-
-procedure Json.65 (Json.66, Json.112, #Attr.12):
-    let Json.64 : Str = StructAtIndex 0 #Attr.12;
-    inc Json.64;
+procedure Json.103 (Json.104, Json.321, #Attr.12):
+    let Json.102 : List {Str, {Str}} = StructAtIndex 0 #Attr.12;
+    inc Json.102;
     dec #Attr.12;
-    let Json.154 : I32 = 34i64;
-    let Json.153 : U8 = CallByName Num.123 Json.154;
-    let Json.151 : List U8 = CallByName List.4 Json.66 Json.153;
-    let Json.152 : List U8 = CallByName Str.12 Json.64;
-    let Json.148 : List U8 = CallByName List.8 Json.151 Json.152;
-    let Json.150 : I32 = 34i64;
-    let Json.149 : U8 = CallByName Num.123 Json.150;
-    let Json.147 : List U8 = CallByName List.4 Json.148 Json.149;
-    ret Json.147;
+    let Json.357 : I32 = 123i64;
+    let Json.356 : U8 = CallByName Num.123 Json.357;
+    let Json.106 : List U8 = CallByName List.4 Json.104 Json.356;
+    let Json.355 : U64 = CallByName List.6 Json.102;
+    let Json.332 : {List U8, U64} = Struct {Json.106, Json.355};
+    let Json.333 : {} = Struct {};
+    let Json.331 : {List U8, U64} = CallByName List.18 Json.102 Json.332 Json.333;
+    dec Json.102;
+    let Json.108 : List U8 = StructAtIndex 0 Json.331;
+    inc Json.108;
+    dec Json.331;
+    let Json.330 : I32 = 125i64;
+    let Json.329 : U8 = CallByName Num.123 Json.330;
+    let Json.328 : List U8 = CallByName List.4 Json.108 Json.329;
+    ret Json.328;
 
-procedure Json.81 (Json.82, Json.109, #Attr.12):
-    let Json.80 : List {Str, {Str}} = StructAtIndex 0 #Attr.12;
-    inc Json.80;
-    dec #Attr.12;
-    let Json.145 : I32 = 123i64;
-    let Json.144 : U8 = CallByName Num.123 Json.145;
-    let Json.84 : List U8 = CallByName List.4 Json.82 Json.144;
-    let Json.143 : U64 = CallByName List.6 Json.80;
-    let Json.120 : {List U8, U64} = Struct {Json.84, Json.143};
-    let Json.121 : {} = Struct {};
-    let Json.119 : {List U8, U64} = CallByName List.18 Json.80 Json.120 Json.121;
-    dec Json.80;
-    let Json.86 : List U8 = StructAtIndex 0 Json.119;
-    inc Json.86;
-    dec Json.119;
-    let Json.118 : I32 = 125i64;
-    let Json.117 : U8 = CallByName Num.123 Json.118;
-    let Json.116 : List U8 = CallByName List.4 Json.86 Json.117;
-    ret Json.116;
-
-procedure Json.83 (Json.114, Json.115):
-    let Json.89 : Str = StructAtIndex 0 Json.115;
-    inc Json.89;
-    let Json.90 : {Str} = StructAtIndex 1 Json.115;
-    inc Json.90;
-    dec Json.115;
-    let Json.87 : List U8 = StructAtIndex 0 Json.114;
-    inc Json.87;
-    let Json.88 : U64 = StructAtIndex 1 Json.114;
-    dec Json.114;
-    let Json.142 : I32 = 34i64;
-    let Json.141 : U8 = CallByName Num.123 Json.142;
-    let Json.139 : List U8 = CallByName List.4 Json.87 Json.141;
-    let Json.140 : List U8 = CallByName Str.12 Json.89;
-    let Json.136 : List U8 = CallByName List.8 Json.139 Json.140;
-    let Json.138 : I32 = 34i64;
-    let Json.137 : U8 = CallByName Num.123 Json.138;
-    let Json.133 : List U8 = CallByName List.4 Json.136 Json.137;
-    let Json.135 : I32 = 58i64;
-    let Json.134 : U8 = CallByName Num.123 Json.135;
-    let Json.131 : List U8 = CallByName List.4 Json.133 Json.134;
-    let Json.132 : {} = Struct {};
-    let Json.91 : List U8 = CallByName Encode.23 Json.131 Json.90 Json.132;
-    joinpoint Json.126 Json.92:
-        let Json.124 : U64 = 1i64;
-        let Json.123 : U64 = CallByName Num.20 Json.88 Json.124;
-        let Json.122 : {List U8, U64} = Struct {Json.92, Json.123};
-        ret Json.122;
+procedure Json.105 (Json.326, Json.327):
+    let Json.111 : Str = StructAtIndex 0 Json.327;
+    inc Json.111;
+    let Json.112 : {Str} = StructAtIndex 1 Json.327;
+    inc Json.112;
+    dec Json.327;
+    let Json.109 : List U8 = StructAtIndex 0 Json.326;
+    inc Json.109;
+    let Json.110 : U64 = StructAtIndex 1 Json.326;
+    dec Json.326;
+    let Json.354 : I32 = 34i64;
+    let Json.353 : U8 = CallByName Num.123 Json.354;
+    let Json.351 : List U8 = CallByName List.4 Json.109 Json.353;
+    let Json.352 : List U8 = CallByName Str.12 Json.111;
+    let Json.348 : List U8 = CallByName List.8 Json.351 Json.352;
+    let Json.350 : I32 = 34i64;
+    let Json.349 : U8 = CallByName Num.123 Json.350;
+    let Json.345 : List U8 = CallByName List.4 Json.348 Json.349;
+    let Json.347 : I32 = 58i64;
+    let Json.346 : U8 = CallByName Num.123 Json.347;
+    let Json.343 : List U8 = CallByName List.4 Json.345 Json.346;
+    let Json.344 : {} = Struct {};
+    let Json.113 : List U8 = CallByName Encode.23 Json.343 Json.112 Json.344;
+    joinpoint Json.338 Json.114:
+        let Json.336 : U64 = 1i64;
+        let Json.335 : U64 = CallByName Num.20 Json.110 Json.336;
+        let Json.334 : {List U8, U64} = Struct {Json.114, Json.335};
+        ret Json.334;
     in
-    let Json.130 : U64 = 1i64;
-    let Json.127 : Int1 = CallByName Num.24 Json.88 Json.130;
-    if Json.127 then
-        let Json.129 : I32 = 44i64;
-        let Json.128 : U8 = CallByName Num.123 Json.129;
-        let Json.125 : List U8 = CallByName List.4 Json.91 Json.128;
-        jump Json.126 Json.125;
+    let Json.342 : U64 = 1i64;
+    let Json.339 : Int1 = CallByName Num.24 Json.110 Json.342;
+    if Json.339 then
+        let Json.341 : I32 = 44i64;
+        let Json.340 : U8 = CallByName Num.123 Json.341;
+        let Json.337 : List U8 = CallByName List.4 Json.113 Json.340;
+        jump Json.338 Json.337;
     else
-        jump Json.126 Json.91;
+        jump Json.338 Json.113;
+
+procedure Json.18 (Json.86):
+    let Json.323 : {Str} = Struct {Json.86};
+    let Json.322 : {Str} = CallByName Encode.22 Json.323;
+    ret Json.322;
+
+procedure Json.20 (Json.102):
+    let Json.320 : {List {Str, {Str}}} = Struct {Json.102};
+    let Json.319 : {List {Str, {Str}}} = CallByName Encode.22 Json.320;
+    ret Json.319;
+
+procedure Json.87 (Json.88, Json.324, #Attr.12):
+    let Json.86 : Str = StructAtIndex 0 #Attr.12;
+    inc Json.86;
+    dec #Attr.12;
+    let Json.366 : I32 = 34i64;
+    let Json.365 : U8 = CallByName Num.123 Json.366;
+    let Json.363 : List U8 = CallByName List.4 Json.88 Json.365;
+    let Json.364 : List U8 = CallByName Str.12 Json.86;
+    let Json.360 : List U8 = CallByName List.8 Json.363 Json.364;
+    let Json.362 : I32 = 34i64;
+    let Json.361 : U8 = CallByName Num.123 Json.362;
+    let Json.359 : List U8 = CallByName List.4 Json.360 Json.361;
+    ret Json.359;
 
 procedure List.133 (List.134, List.135, #Attr.12):
     let List.132 : {} = StructAtIndex 0 #Attr.12;
-    let List.441 : {List U8, U64} = CallByName Json.83 List.134 List.135;
+    let List.441 : {List U8, U64} = CallByName Json.105 List.134 List.135;
     let List.440 : [C [], C {List U8, U64}] = TagId(1) List.441;
     ret List.440;
 
diff --git a/crates/compiler/test_mono/generated/encode_derived_record_two_field_strings.txt b/crates/compiler/test_mono/generated/encode_derived_record_two_field_strings.txt
index 2d895e110b..e2211c6e60 100644
--- a/crates/compiler/test_mono/generated/encode_derived_record_two_field_strings.txt
+++ b/crates/compiler/test_mono/generated/encode_derived_record_two_field_strings.txt
@@ -10,16 +10,16 @@ procedure #Derived.2 (#Derived.3, #Derived.4, #Attr.12):
     let #Derived_gen.11 : Str = "a";
     let #Derived_gen.13 : Str = StructAtIndex 0 #Derived.1;
     inc #Derived_gen.13;
-    let #Derived_gen.12 : {Str} = CallByName Json.17 #Derived_gen.13;
+    let #Derived_gen.12 : {Str} = CallByName Json.18 #Derived_gen.13;
     let #Derived_gen.6 : {Str, {Str}} = Struct {#Derived_gen.11, #Derived_gen.12};
     let #Derived_gen.8 : Str = "b";
     let #Derived_gen.10 : Str = StructAtIndex 1 #Derived.1;
     inc #Derived_gen.10;
     dec #Derived.1;
-    let #Derived_gen.9 : {Str} = CallByName Json.17 #Derived_gen.10;
+    let #Derived_gen.9 : {Str} = CallByName Json.18 #Derived_gen.10;
     let #Derived_gen.7 : {Str, {Str}} = Struct {#Derived_gen.8, #Derived_gen.9};
     let #Derived_gen.5 : List {Str, {Str}} = Array [#Derived_gen.6, #Derived_gen.7];
-    let #Derived_gen.4 : {List {Str, {Str}}} = CallByName Json.19 #Derived_gen.5;
+    let #Derived_gen.4 : {List {Str, {Str}}} = CallByName Json.20 #Derived_gen.5;
     let #Derived_gen.3 : List U8 = CallByName Encode.23 #Derived.3 #Derived_gen.4 #Derived.4;
     ret #Derived_gen.3;
 
@@ -37,11 +37,11 @@ procedure Encode.23 (Encode.94, Encode.102, Encode.96):
     ret Encode.106;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.113 : List U8 = CallByName Json.81 Encode.94 Encode.96 Encode.102;
+    let Encode.113 : List U8 = CallByName Json.103 Encode.94 Encode.96 Encode.102;
     ret Encode.113;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.117 : List U8 = CallByName Json.65 Encode.94 Encode.96 Encode.102;
+    let Encode.117 : List U8 = CallByName Json.87 Encode.94 Encode.96 Encode.102;
     ret Encode.117;
 
 procedure Encode.25 (Encode.100, Encode.101):
@@ -51,95 +51,95 @@ procedure Encode.25 (Encode.100, Encode.101):
     ret Encode.103;
 
 procedure Json.1 ():
-    let Json.106 : {} = Struct {};
-    ret Json.106;
+    let Json.318 : {} = Struct {};
+    ret Json.318;
 
-procedure Json.17 (Json.64):
-    let Json.114 : {Str} = Struct {Json.64};
-    let Json.113 : {Str} = CallByName Encode.22 Json.114;
-    ret Json.113;
-
-procedure Json.19 (Json.80):
-    let Json.108 : {List {Str, {Str}}} = Struct {Json.80};
-    let Json.107 : {List {Str, {Str}}} = CallByName Encode.22 Json.108;
-    ret Json.107;
-
-procedure Json.65 (Json.66, Json.112, #Attr.12):
-    let Json.64 : Str = StructAtIndex 0 #Attr.12;
-    inc Json.64;
+procedure Json.103 (Json.104, Json.321, #Attr.12):
+    let Json.102 : List {Str, {Str}} = StructAtIndex 0 #Attr.12;
+    inc Json.102;
     dec #Attr.12;
-    let Json.157 : I32 = 34i64;
-    let Json.156 : U8 = CallByName Num.123 Json.157;
-    let Json.154 : List U8 = CallByName List.4 Json.66 Json.156;
-    let Json.155 : List U8 = CallByName Str.12 Json.64;
-    let Json.151 : List U8 = CallByName List.8 Json.154 Json.155;
-    let Json.153 : I32 = 34i64;
-    let Json.152 : U8 = CallByName Num.123 Json.153;
-    let Json.150 : List U8 = CallByName List.4 Json.151 Json.152;
-    ret Json.150;
+    let Json.360 : I32 = 123i64;
+    let Json.359 : U8 = CallByName Num.123 Json.360;
+    let Json.106 : List U8 = CallByName List.4 Json.104 Json.359;
+    let Json.358 : U64 = CallByName List.6 Json.102;
+    let Json.335 : {List U8, U64} = Struct {Json.106, Json.358};
+    let Json.336 : {} = Struct {};
+    let Json.334 : {List U8, U64} = CallByName List.18 Json.102 Json.335 Json.336;
+    dec Json.102;
+    let Json.108 : List U8 = StructAtIndex 0 Json.334;
+    inc Json.108;
+    dec Json.334;
+    let Json.333 : I32 = 125i64;
+    let Json.332 : U8 = CallByName Num.123 Json.333;
+    let Json.331 : List U8 = CallByName List.4 Json.108 Json.332;
+    ret Json.331;
 
-procedure Json.81 (Json.82, Json.109, #Attr.12):
-    let Json.80 : List {Str, {Str}} = StructAtIndex 0 #Attr.12;
-    inc Json.80;
-    dec #Attr.12;
-    let Json.148 : I32 = 123i64;
-    let Json.147 : U8 = CallByName Num.123 Json.148;
-    let Json.84 : List U8 = CallByName List.4 Json.82 Json.147;
-    let Json.146 : U64 = CallByName List.6 Json.80;
-    let Json.123 : {List U8, U64} = Struct {Json.84, Json.146};
-    let Json.124 : {} = Struct {};
-    let Json.122 : {List U8, U64} = CallByName List.18 Json.80 Json.123 Json.124;
-    dec Json.80;
-    let Json.86 : List U8 = StructAtIndex 0 Json.122;
-    inc Json.86;
-    dec Json.122;
-    let Json.121 : I32 = 125i64;
-    let Json.120 : U8 = CallByName Num.123 Json.121;
-    let Json.119 : List U8 = CallByName List.4 Json.86 Json.120;
-    ret Json.119;
-
-procedure Json.83 (Json.117, Json.118):
-    let Json.89 : Str = StructAtIndex 0 Json.118;
-    inc Json.89;
-    let Json.90 : {Str} = StructAtIndex 1 Json.118;
-    inc Json.90;
-    dec Json.118;
-    let Json.87 : List U8 = StructAtIndex 0 Json.117;
-    inc Json.87;
-    let Json.88 : U64 = StructAtIndex 1 Json.117;
-    dec Json.117;
-    let Json.145 : I32 = 34i64;
-    let Json.144 : U8 = CallByName Num.123 Json.145;
-    let Json.142 : List U8 = CallByName List.4 Json.87 Json.144;
-    let Json.143 : List U8 = CallByName Str.12 Json.89;
-    let Json.139 : List U8 = CallByName List.8 Json.142 Json.143;
-    let Json.141 : I32 = 34i64;
-    let Json.140 : U8 = CallByName Num.123 Json.141;
-    let Json.136 : List U8 = CallByName List.4 Json.139 Json.140;
-    let Json.138 : I32 = 58i64;
-    let Json.137 : U8 = CallByName Num.123 Json.138;
-    let Json.134 : List U8 = CallByName List.4 Json.136 Json.137;
-    let Json.135 : {} = Struct {};
-    let Json.91 : List U8 = CallByName Encode.23 Json.134 Json.90 Json.135;
-    joinpoint Json.129 Json.92:
-        let Json.127 : U64 = 1i64;
-        let Json.126 : U64 = CallByName Num.20 Json.88 Json.127;
-        let Json.125 : {List U8, U64} = Struct {Json.92, Json.126};
-        ret Json.125;
+procedure Json.105 (Json.329, Json.330):
+    let Json.111 : Str = StructAtIndex 0 Json.330;
+    inc Json.111;
+    let Json.112 : {Str} = StructAtIndex 1 Json.330;
+    inc Json.112;
+    dec Json.330;
+    let Json.109 : List U8 = StructAtIndex 0 Json.329;
+    inc Json.109;
+    let Json.110 : U64 = StructAtIndex 1 Json.329;
+    dec Json.329;
+    let Json.357 : I32 = 34i64;
+    let Json.356 : U8 = CallByName Num.123 Json.357;
+    let Json.354 : List U8 = CallByName List.4 Json.109 Json.356;
+    let Json.355 : List U8 = CallByName Str.12 Json.111;
+    let Json.351 : List U8 = CallByName List.8 Json.354 Json.355;
+    let Json.353 : I32 = 34i64;
+    let Json.352 : U8 = CallByName Num.123 Json.353;
+    let Json.348 : List U8 = CallByName List.4 Json.351 Json.352;
+    let Json.350 : I32 = 58i64;
+    let Json.349 : U8 = CallByName Num.123 Json.350;
+    let Json.346 : List U8 = CallByName List.4 Json.348 Json.349;
+    let Json.347 : {} = Struct {};
+    let Json.113 : List U8 = CallByName Encode.23 Json.346 Json.112 Json.347;
+    joinpoint Json.341 Json.114:
+        let Json.339 : U64 = 1i64;
+        let Json.338 : U64 = CallByName Num.20 Json.110 Json.339;
+        let Json.337 : {List U8, U64} = Struct {Json.114, Json.338};
+        ret Json.337;
     in
-    let Json.133 : U64 = 1i64;
-    let Json.130 : Int1 = CallByName Num.24 Json.88 Json.133;
-    if Json.130 then
-        let Json.132 : I32 = 44i64;
-        let Json.131 : U8 = CallByName Num.123 Json.132;
-        let Json.128 : List U8 = CallByName List.4 Json.91 Json.131;
-        jump Json.129 Json.128;
+    let Json.345 : U64 = 1i64;
+    let Json.342 : Int1 = CallByName Num.24 Json.110 Json.345;
+    if Json.342 then
+        let Json.344 : I32 = 44i64;
+        let Json.343 : U8 = CallByName Num.123 Json.344;
+        let Json.340 : List U8 = CallByName List.4 Json.113 Json.343;
+        jump Json.341 Json.340;
     else
-        jump Json.129 Json.91;
+        jump Json.341 Json.113;
+
+procedure Json.18 (Json.86):
+    let Json.326 : {Str} = Struct {Json.86};
+    let Json.325 : {Str} = CallByName Encode.22 Json.326;
+    ret Json.325;
+
+procedure Json.20 (Json.102):
+    let Json.320 : {List {Str, {Str}}} = Struct {Json.102};
+    let Json.319 : {List {Str, {Str}}} = CallByName Encode.22 Json.320;
+    ret Json.319;
+
+procedure Json.87 (Json.88, Json.324, #Attr.12):
+    let Json.86 : Str = StructAtIndex 0 #Attr.12;
+    inc Json.86;
+    dec #Attr.12;
+    let Json.369 : I32 = 34i64;
+    let Json.368 : U8 = CallByName Num.123 Json.369;
+    let Json.366 : List U8 = CallByName List.4 Json.88 Json.368;
+    let Json.367 : List U8 = CallByName Str.12 Json.86;
+    let Json.363 : List U8 = CallByName List.8 Json.366 Json.367;
+    let Json.365 : I32 = 34i64;
+    let Json.364 : U8 = CallByName Num.123 Json.365;
+    let Json.362 : List U8 = CallByName List.4 Json.363 Json.364;
+    ret Json.362;
 
 procedure List.133 (List.134, List.135, #Attr.12):
     let List.132 : {} = StructAtIndex 0 #Attr.12;
-    let List.441 : {List U8, U64} = CallByName Json.83 List.134 List.135;
+    let List.441 : {List U8, U64} = CallByName Json.105 List.134 List.135;
     let List.440 : [C [], C {List U8, U64}] = TagId(1) List.441;
     ret List.440;
 
diff --git a/crates/compiler/test_mono/generated/encode_derived_string.txt b/crates/compiler/test_mono/generated/encode_derived_string.txt
index 0348ec3e3f..ee3bd4f34a 100644
--- a/crates/compiler/test_mono/generated/encode_derived_string.txt
+++ b/crates/compiler/test_mono/generated/encode_derived_string.txt
@@ -2,37 +2,37 @@ procedure Encode.22 (Encode.93):
     ret Encode.93;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.106 : List U8 = CallByName Json.65 Encode.94 Encode.96 Encode.102;
+    let Encode.106 : List U8 = CallByName Json.87 Encode.94 Encode.96 Encode.102;
     ret Encode.106;
 
 procedure Encode.25 (Encode.100, Encode.101):
     let Encode.104 : List U8 = Array [];
-    let Encode.105 : {Str} = CallByName Json.17 Encode.100;
+    let Encode.105 : {Str} = CallByName Json.18 Encode.100;
     let Encode.103 : List U8 = CallByName Encode.23 Encode.104 Encode.105 Encode.101;
     ret Encode.103;
 
 procedure Json.1 ():
-    let Json.106 : {} = Struct {};
-    ret Json.106;
+    let Json.318 : {} = Struct {};
+    ret Json.318;
 
-procedure Json.17 (Json.64):
-    let Json.108 : {Str} = Struct {Json.64};
-    let Json.107 : {Str} = CallByName Encode.22 Json.108;
-    ret Json.107;
+procedure Json.18 (Json.86):
+    let Json.320 : {Str} = Struct {Json.86};
+    let Json.319 : {Str} = CallByName Encode.22 Json.320;
+    ret Json.319;
 
-procedure Json.65 (Json.66, Json.109, #Attr.12):
-    let Json.64 : Str = StructAtIndex 0 #Attr.12;
-    inc Json.64;
+procedure Json.87 (Json.88, Json.321, #Attr.12):
+    let Json.86 : Str = StructAtIndex 0 #Attr.12;
+    inc Json.86;
     dec #Attr.12;
-    let Json.118 : I32 = 34i64;
-    let Json.117 : U8 = CallByName Num.123 Json.118;
-    let Json.115 : List U8 = CallByName List.4 Json.66 Json.117;
-    let Json.116 : List U8 = CallByName Str.12 Json.64;
-    let Json.112 : List U8 = CallByName List.8 Json.115 Json.116;
-    let Json.114 : I32 = 34i64;
-    let Json.113 : U8 = CallByName Num.123 Json.114;
-    let Json.111 : List U8 = CallByName List.4 Json.112 Json.113;
-    ret Json.111;
+    let Json.330 : I32 = 34i64;
+    let Json.329 : U8 = CallByName Num.123 Json.330;
+    let Json.327 : List U8 = CallByName List.4 Json.88 Json.329;
+    let Json.328 : List U8 = CallByName Str.12 Json.86;
+    let Json.324 : List U8 = CallByName List.8 Json.327 Json.328;
+    let Json.326 : I32 = 34i64;
+    let Json.325 : U8 = CallByName Num.123 Json.326;
+    let Json.323 : List U8 = CallByName List.4 Json.324 Json.325;
+    ret Json.323;
 
 procedure List.4 (List.101, List.102):
     let List.392 : U64 = 1i64;
diff --git a/crates/compiler/test_mono/generated/encode_derived_tag_one_field_string.txt b/crates/compiler/test_mono/generated/encode_derived_tag_one_field_string.txt
index 4aaea1d783..781e31459e 100644
--- a/crates/compiler/test_mono/generated/encode_derived_tag_one_field_string.txt
+++ b/crates/compiler/test_mono/generated/encode_derived_tag_one_field_string.txt
@@ -12,9 +12,9 @@ procedure #Derived.3 (#Derived.4, #Derived.5, #Attr.12):
         ret #Derived_gen.3;
     in
     let #Derived_gen.7 : Str = "A";
-    let #Derived_gen.9 : {Str} = CallByName Json.17 #Derived.1;
+    let #Derived_gen.9 : {Str} = CallByName Json.18 #Derived.1;
     let #Derived_gen.8 : List {Str} = Array [#Derived_gen.9];
-    let #Derived_gen.6 : {Str, List {Str}} = CallByName Json.20 #Derived_gen.7 #Derived_gen.8;
+    let #Derived_gen.6 : {Str, List {Str}} = CallByName Json.21 #Derived_gen.7 #Derived_gen.8;
     jump #Derived_gen.5 #Derived_gen.6;
 
 procedure Encode.22 (Encode.93):
@@ -31,11 +31,11 @@ procedure Encode.23 (Encode.94, Encode.102, Encode.96):
     ret Encode.106;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.113 : List U8 = CallByName Json.95 Encode.94 Encode.96 Encode.102;
+    let Encode.113 : List U8 = CallByName Json.117 Encode.94 Encode.96 Encode.102;
     ret Encode.113;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.116 : List U8 = CallByName Json.65 Encode.94 Encode.96 Encode.102;
+    let Encode.116 : List U8 = CallByName Json.87 Encode.94 Encode.96 Encode.102;
     ret Encode.116;
 
 procedure Encode.25 (Encode.100, Encode.101):
@@ -45,98 +45,98 @@ procedure Encode.25 (Encode.100, Encode.101):
     ret Encode.103;
 
 procedure Json.1 ():
-    let Json.106 : {} = Struct {};
-    ret Json.106;
+    let Json.318 : {} = Struct {};
+    ret Json.318;
 
-procedure Json.17 (Json.64):
-    let Json.111 : {Str} = Struct {Json.64};
-    let Json.110 : {Str} = CallByName Encode.22 Json.111;
-    ret Json.110;
-
-procedure Json.20 (Json.93, Json.94):
-    let Json.108 : {Str, List {Str}} = Struct {Json.93, Json.94};
-    let Json.107 : {Str, List {Str}} = CallByName Encode.22 Json.108;
-    ret Json.107;
-
-procedure Json.65 (Json.66, Json.112, #Attr.12):
-    let Json.64 : Str = StructAtIndex 0 #Attr.12;
-    inc Json.64;
+procedure Json.117 (Json.118, Json.321, #Attr.12):
+    let Json.116 : List {Str} = StructAtIndex 1 #Attr.12;
+    inc Json.116;
+    let Json.115 : Str = StructAtIndex 0 #Attr.12;
+    inc Json.115;
     dec #Attr.12;
-    let Json.159 : I32 = 34i64;
-    let Json.158 : U8 = CallByName Num.123 Json.159;
-    let Json.156 : List U8 = CallByName List.4 Json.66 Json.158;
-    let Json.157 : List U8 = CallByName Str.12 Json.64;
-    let Json.153 : List U8 = CallByName List.8 Json.156 Json.157;
-    let Json.155 : I32 = 34i64;
-    let Json.154 : U8 = CallByName Num.123 Json.155;
-    let Json.152 : List U8 = CallByName List.4 Json.153 Json.154;
-    ret Json.152;
+    let Json.362 : I32 = 123i64;
+    let Json.361 : U8 = CallByName Num.123 Json.362;
+    let Json.358 : List U8 = CallByName List.4 Json.118 Json.361;
+    let Json.360 : I32 = 34i64;
+    let Json.359 : U8 = CallByName Num.123 Json.360;
+    let Json.356 : List U8 = CallByName List.4 Json.358 Json.359;
+    let Json.357 : List U8 = CallByName Str.12 Json.115;
+    let Json.353 : List U8 = CallByName List.8 Json.356 Json.357;
+    let Json.355 : I32 = 34i64;
+    let Json.354 : U8 = CallByName Num.123 Json.355;
+    let Json.350 : List U8 = CallByName List.4 Json.353 Json.354;
+    let Json.352 : I32 = 58i64;
+    let Json.351 : U8 = CallByName Num.123 Json.352;
+    let Json.347 : List U8 = CallByName List.4 Json.350 Json.351;
+    let Json.349 : I32 = 91i64;
+    let Json.348 : U8 = CallByName Num.123 Json.349;
+    let Json.120 : List U8 = CallByName List.4 Json.347 Json.348;
+    let Json.346 : U64 = CallByName List.6 Json.116;
+    let Json.334 : {List U8, U64} = Struct {Json.120, Json.346};
+    let Json.335 : {} = Struct {};
+    let Json.333 : {List U8, U64} = CallByName List.18 Json.116 Json.334 Json.335;
+    dec Json.116;
+    let Json.122 : List U8 = StructAtIndex 0 Json.333;
+    inc Json.122;
+    dec Json.333;
+    let Json.332 : I32 = 93i64;
+    let Json.331 : U8 = CallByName Num.123 Json.332;
+    let Json.328 : List U8 = CallByName List.4 Json.122 Json.331;
+    let Json.330 : I32 = 125i64;
+    let Json.329 : U8 = CallByName Num.123 Json.330;
+    let Json.327 : List U8 = CallByName List.4 Json.328 Json.329;
+    ret Json.327;
 
-procedure Json.95 (Json.96, Json.109, #Attr.12):
-    let Json.94 : List {Str} = StructAtIndex 1 #Attr.12;
-    inc Json.94;
-    let Json.93 : Str = StructAtIndex 0 #Attr.12;
-    inc Json.93;
-    dec #Attr.12;
-    let Json.150 : I32 = 123i64;
-    let Json.149 : U8 = CallByName Num.123 Json.150;
-    let Json.146 : List U8 = CallByName List.4 Json.96 Json.149;
-    let Json.148 : I32 = 34i64;
-    let Json.147 : U8 = CallByName Num.123 Json.148;
-    let Json.144 : List U8 = CallByName List.4 Json.146 Json.147;
-    let Json.145 : List U8 = CallByName Str.12 Json.93;
-    let Json.141 : List U8 = CallByName List.8 Json.144 Json.145;
-    let Json.143 : I32 = 34i64;
-    let Json.142 : U8 = CallByName Num.123 Json.143;
-    let Json.138 : List U8 = CallByName List.4 Json.141 Json.142;
-    let Json.140 : I32 = 58i64;
-    let Json.139 : U8 = CallByName Num.123 Json.140;
-    let Json.135 : List U8 = CallByName List.4 Json.138 Json.139;
-    let Json.137 : I32 = 91i64;
-    let Json.136 : U8 = CallByName Num.123 Json.137;
-    let Json.98 : List U8 = CallByName List.4 Json.135 Json.136;
-    let Json.134 : U64 = CallByName List.6 Json.94;
-    let Json.122 : {List U8, U64} = Struct {Json.98, Json.134};
-    let Json.123 : {} = Struct {};
-    let Json.121 : {List U8, U64} = CallByName List.18 Json.94 Json.122 Json.123;
-    dec Json.94;
-    let Json.100 : List U8 = StructAtIndex 0 Json.121;
-    inc Json.100;
-    dec Json.121;
-    let Json.120 : I32 = 93i64;
-    let Json.119 : U8 = CallByName Num.123 Json.120;
-    let Json.116 : List U8 = CallByName List.4 Json.100 Json.119;
-    let Json.118 : I32 = 125i64;
-    let Json.117 : U8 = CallByName Num.123 Json.118;
-    let Json.115 : List U8 = CallByName List.4 Json.116 Json.117;
-    ret Json.115;
-
-procedure Json.97 (Json.114, Json.103):
-    let Json.101 : List U8 = StructAtIndex 0 Json.114;
-    inc Json.101;
-    let Json.102 : U64 = StructAtIndex 1 Json.114;
-    dec Json.114;
-    let Json.133 : {} = Struct {};
-    let Json.104 : List U8 = CallByName Encode.23 Json.101 Json.103 Json.133;
-    joinpoint Json.128 Json.105:
-        let Json.126 : U64 = 1i64;
-        let Json.125 : U64 = CallByName Num.20 Json.102 Json.126;
-        let Json.124 : {List U8, U64} = Struct {Json.105, Json.125};
-        ret Json.124;
+procedure Json.119 (Json.326, Json.125):
+    let Json.123 : List U8 = StructAtIndex 0 Json.326;
+    inc Json.123;
+    let Json.124 : U64 = StructAtIndex 1 Json.326;
+    dec Json.326;
+    let Json.345 : {} = Struct {};
+    let Json.126 : List U8 = CallByName Encode.23 Json.123 Json.125 Json.345;
+    joinpoint Json.340 Json.127:
+        let Json.338 : U64 = 1i64;
+        let Json.337 : U64 = CallByName Num.20 Json.124 Json.338;
+        let Json.336 : {List U8, U64} = Struct {Json.127, Json.337};
+        ret Json.336;
     in
-    let Json.132 : U64 = 1i64;
-    let Json.129 : Int1 = CallByName Num.24 Json.102 Json.132;
-    if Json.129 then
-        let Json.131 : I32 = 44i64;
-        let Json.130 : U8 = CallByName Num.123 Json.131;
-        let Json.127 : List U8 = CallByName List.4 Json.104 Json.130;
-        jump Json.128 Json.127;
+    let Json.344 : U64 = 1i64;
+    let Json.341 : Int1 = CallByName Num.24 Json.124 Json.344;
+    if Json.341 then
+        let Json.343 : I32 = 44i64;
+        let Json.342 : U8 = CallByName Num.123 Json.343;
+        let Json.339 : List U8 = CallByName List.4 Json.126 Json.342;
+        jump Json.340 Json.339;
     else
-        jump Json.128 Json.104;
+        jump Json.340 Json.126;
+
+procedure Json.18 (Json.86):
+    let Json.323 : {Str} = Struct {Json.86};
+    let Json.322 : {Str} = CallByName Encode.22 Json.323;
+    ret Json.322;
+
+procedure Json.21 (Json.115, Json.116):
+    let Json.320 : {Str, List {Str}} = Struct {Json.115, Json.116};
+    let Json.319 : {Str, List {Str}} = CallByName Encode.22 Json.320;
+    ret Json.319;
+
+procedure Json.87 (Json.88, Json.324, #Attr.12):
+    let Json.86 : Str = StructAtIndex 0 #Attr.12;
+    inc Json.86;
+    dec #Attr.12;
+    let Json.371 : I32 = 34i64;
+    let Json.370 : U8 = CallByName Num.123 Json.371;
+    let Json.368 : List U8 = CallByName List.4 Json.88 Json.370;
+    let Json.369 : List U8 = CallByName Str.12 Json.86;
+    let Json.365 : List U8 = CallByName List.8 Json.368 Json.369;
+    let Json.367 : I32 = 34i64;
+    let Json.366 : U8 = CallByName Num.123 Json.367;
+    let Json.364 : List U8 = CallByName List.4 Json.365 Json.366;
+    ret Json.364;
 
 procedure List.133 (List.134, List.135, #Attr.12):
     let List.132 : {} = StructAtIndex 0 #Attr.12;
-    let List.447 : {List U8, U64} = CallByName Json.97 List.134 List.135;
+    let List.447 : {List U8, U64} = CallByName Json.119 List.134 List.135;
     let List.446 : [C [], C {List U8, U64}] = TagId(1) List.447;
     ret List.446;
 
diff --git a/crates/compiler/test_mono/generated/encode_derived_tag_two_payloads_string.txt b/crates/compiler/test_mono/generated/encode_derived_tag_two_payloads_string.txt
index 1329435b75..2379877e3b 100644
--- a/crates/compiler/test_mono/generated/encode_derived_tag_two_payloads_string.txt
+++ b/crates/compiler/test_mono/generated/encode_derived_tag_two_payloads_string.txt
@@ -17,10 +17,10 @@ procedure #Derived.4 (#Derived.5, #Derived.6, #Attr.12):
     inc #Derived.3;
     dec #Derived.1;
     let #Derived_gen.7 : Str = "A";
-    let #Derived_gen.9 : {Str} = CallByName Json.17 #Derived.2;
-    let #Derived_gen.10 : {Str} = CallByName Json.17 #Derived.3;
+    let #Derived_gen.9 : {Str} = CallByName Json.18 #Derived.2;
+    let #Derived_gen.10 : {Str} = CallByName Json.18 #Derived.3;
     let #Derived_gen.8 : List {Str} = Array [#Derived_gen.9, #Derived_gen.10];
-    let #Derived_gen.6 : {Str, List {Str}} = CallByName Json.20 #Derived_gen.7 #Derived_gen.8;
+    let #Derived_gen.6 : {Str, List {Str}} = CallByName Json.21 #Derived_gen.7 #Derived_gen.8;
     jump #Derived_gen.5 #Derived_gen.6;
 
 procedure Encode.22 (Encode.93):
@@ -37,11 +37,11 @@ procedure Encode.23 (Encode.94, Encode.102, Encode.96):
     ret Encode.106;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.113 : List U8 = CallByName Json.95 Encode.94 Encode.96 Encode.102;
+    let Encode.113 : List U8 = CallByName Json.117 Encode.94 Encode.96 Encode.102;
     ret Encode.113;
 
 procedure Encode.23 (Encode.94, Encode.102, Encode.96):
-    let Encode.117 : List U8 = CallByName Json.65 Encode.94 Encode.96 Encode.102;
+    let Encode.117 : List U8 = CallByName Json.87 Encode.94 Encode.96 Encode.102;
     ret Encode.117;
 
 procedure Encode.25 (Encode.100, Encode.101):
@@ -51,98 +51,98 @@ procedure Encode.25 (Encode.100, Encode.101):
     ret Encode.103;
 
 procedure Json.1 ():
-    let Json.106 : {} = Struct {};
-    ret Json.106;
+    let Json.318 : {} = Struct {};
+    ret Json.318;
 
-procedure Json.17 (Json.64):
-    let Json.114 : {Str} = Struct {Json.64};
-    let Json.113 : {Str} = CallByName Encode.22 Json.114;
-    ret Json.113;
-
-procedure Json.20 (Json.93, Json.94):
-    let Json.108 : {Str, List {Str}} = Struct {Json.93, Json.94};
-    let Json.107 : {Str, List {Str}} = CallByName Encode.22 Json.108;
-    ret Json.107;
-
-procedure Json.65 (Json.66, Json.112, #Attr.12):
-    let Json.64 : Str = StructAtIndex 0 #Attr.12;
-    inc Json.64;
+procedure Json.117 (Json.118, Json.321, #Attr.12):
+    let Json.116 : List {Str} = StructAtIndex 1 #Attr.12;
+    inc Json.116;
+    let Json.115 : Str = StructAtIndex 0 #Attr.12;
+    inc Json.115;
     dec #Attr.12;
-    let Json.162 : I32 = 34i64;
-    let Json.161 : U8 = CallByName Num.123 Json.162;
-    let Json.159 : List U8 = CallByName List.4 Json.66 Json.161;
-    let Json.160 : List U8 = CallByName Str.12 Json.64;
-    let Json.156 : List U8 = CallByName List.8 Json.159 Json.160;
-    let Json.158 : I32 = 34i64;
-    let Json.157 : U8 = CallByName Num.123 Json.158;
-    let Json.155 : List U8 = CallByName List.4 Json.156 Json.157;
-    ret Json.155;
+    let Json.365 : I32 = 123i64;
+    let Json.364 : U8 = CallByName Num.123 Json.365;
+    let Json.361 : List U8 = CallByName List.4 Json.118 Json.364;
+    let Json.363 : I32 = 34i64;
+    let Json.362 : U8 = CallByName Num.123 Json.363;
+    let Json.359 : List U8 = CallByName List.4 Json.361 Json.362;
+    let Json.360 : List U8 = CallByName Str.12 Json.115;
+    let Json.356 : List U8 = CallByName List.8 Json.359 Json.360;
+    let Json.358 : I32 = 34i64;
+    let Json.357 : U8 = CallByName Num.123 Json.358;
+    let Json.353 : List U8 = CallByName List.4 Json.356 Json.357;
+    let Json.355 : I32 = 58i64;
+    let Json.354 : U8 = CallByName Num.123 Json.355;
+    let Json.350 : List U8 = CallByName List.4 Json.353 Json.354;
+    let Json.352 : I32 = 91i64;
+    let Json.351 : U8 = CallByName Num.123 Json.352;
+    let Json.120 : List U8 = CallByName List.4 Json.350 Json.351;
+    let Json.349 : U64 = CallByName List.6 Json.116;
+    let Json.337 : {List U8, U64} = Struct {Json.120, Json.349};
+    let Json.338 : {} = Struct {};
+    let Json.336 : {List U8, U64} = CallByName List.18 Json.116 Json.337 Json.338;
+    dec Json.116;
+    let Json.122 : List U8 = StructAtIndex 0 Json.336;
+    inc Json.122;
+    dec Json.336;
+    let Json.335 : I32 = 93i64;
+    let Json.334 : U8 = CallByName Num.123 Json.335;
+    let Json.331 : List U8 = CallByName List.4 Json.122 Json.334;
+    let Json.333 : I32 = 125i64;
+    let Json.332 : U8 = CallByName Num.123 Json.333;
+    let Json.330 : List U8 = CallByName List.4 Json.331 Json.332;
+    ret Json.330;
 
-procedure Json.95 (Json.96, Json.109, #Attr.12):
-    let Json.94 : List {Str} = StructAtIndex 1 #Attr.12;
-    inc Json.94;
-    let Json.93 : Str = StructAtIndex 0 #Attr.12;
-    inc Json.93;
-    dec #Attr.12;
-    let Json.153 : I32 = 123i64;
-    let Json.152 : U8 = CallByName Num.123 Json.153;
-    let Json.149 : List U8 = CallByName List.4 Json.96 Json.152;
-    let Json.151 : I32 = 34i64;
-    let Json.150 : U8 = CallByName Num.123 Json.151;
-    let Json.147 : List U8 = CallByName List.4 Json.149 Json.150;
-    let Json.148 : List U8 = CallByName Str.12 Json.93;
-    let Json.144 : List U8 = CallByName List.8 Json.147 Json.148;
-    let Json.146 : I32 = 34i64;
-    let Json.145 : U8 = CallByName Num.123 Json.146;
-    let Json.141 : List U8 = CallByName List.4 Json.144 Json.145;
-    let Json.143 : I32 = 58i64;
-    let Json.142 : U8 = CallByName Num.123 Json.143;
-    let Json.138 : List U8 = CallByName List.4 Json.141 Json.142;
-    let Json.140 : I32 = 91i64;
-    let Json.139 : U8 = CallByName Num.123 Json.140;
-    let Json.98 : List U8 = CallByName List.4 Json.138 Json.139;
-    let Json.137 : U64 = CallByName List.6 Json.94;
-    let Json.125 : {List U8, U64} = Struct {Json.98, Json.137};
-    let Json.126 : {} = Struct {};
-    let Json.124 : {List U8, U64} = CallByName List.18 Json.94 Json.125 Json.126;
-    dec Json.94;
-    let Json.100 : List U8 = StructAtIndex 0 Json.124;
-    inc Json.100;
-    dec Json.124;
-    let Json.123 : I32 = 93i64;
-    let Json.122 : U8 = CallByName Num.123 Json.123;
-    let Json.119 : List U8 = CallByName List.4 Json.100 Json.122;
-    let Json.121 : I32 = 125i64;
-    let Json.120 : U8 = CallByName Num.123 Json.121;
-    let Json.118 : List U8 = CallByName List.4 Json.119 Json.120;
-    ret Json.118;
-
-procedure Json.97 (Json.117, Json.103):
-    let Json.101 : List U8 = StructAtIndex 0 Json.117;
-    inc Json.101;
-    let Json.102 : U64 = StructAtIndex 1 Json.117;
-    dec Json.117;
-    let Json.136 : {} = Struct {};
-    let Json.104 : List U8 = CallByName Encode.23 Json.101 Json.103 Json.136;
-    joinpoint Json.131 Json.105:
-        let Json.129 : U64 = 1i64;
-        let Json.128 : U64 = CallByName Num.20 Json.102 Json.129;
-        let Json.127 : {List U8, U64} = Struct {Json.105, Json.128};
-        ret Json.127;
+procedure Json.119 (Json.329, Json.125):
+    let Json.123 : List U8 = StructAtIndex 0 Json.329;
+    inc Json.123;
+    let Json.124 : U64 = StructAtIndex 1 Json.329;
+    dec Json.329;
+    let Json.348 : {} = Struct {};
+    let Json.126 : List U8 = CallByName Encode.23 Json.123 Json.125 Json.348;
+    joinpoint Json.343 Json.127:
+        let Json.341 : U64 = 1i64;
+        let Json.340 : U64 = CallByName Num.20 Json.124 Json.341;
+        let Json.339 : {List U8, U64} = Struct {Json.127, Json.340};
+        ret Json.339;
     in
-    let Json.135 : U64 = 1i64;
-    let Json.132 : Int1 = CallByName Num.24 Json.102 Json.135;
-    if Json.132 then
-        let Json.134 : I32 = 44i64;
-        let Json.133 : U8 = CallByName Num.123 Json.134;
-        let Json.130 : List U8 = CallByName List.4 Json.104 Json.133;
-        jump Json.131 Json.130;
+    let Json.347 : U64 = 1i64;
+    let Json.344 : Int1 = CallByName Num.24 Json.124 Json.347;
+    if Json.344 then
+        let Json.346 : I32 = 44i64;
+        let Json.345 : U8 = CallByName Num.123 Json.346;
+        let Json.342 : List U8 = CallByName List.4 Json.126 Json.345;
+        jump Json.343 Json.342;
     else
-        jump Json.131 Json.104;
+        jump Json.343 Json.126;
+
+procedure Json.18 (Json.86):
+    let Json.326 : {Str} = Struct {Json.86};
+    let Json.325 : {Str} = CallByName Encode.22 Json.326;
+    ret Json.325;
+
+procedure Json.21 (Json.115, Json.116):
+    let Json.320 : {Str, List {Str}} = Struct {Json.115, Json.116};
+    let Json.319 : {Str, List {Str}} = CallByName Encode.22 Json.320;
+    ret Json.319;
+
+procedure Json.87 (Json.88, Json.324, #Attr.12):
+    let Json.86 : Str = StructAtIndex 0 #Attr.12;
+    inc Json.86;
+    dec #Attr.12;
+    let Json.374 : I32 = 34i64;
+    let Json.373 : U8 = CallByName Num.123 Json.374;
+    let Json.371 : List U8 = CallByName List.4 Json.88 Json.373;
+    let Json.372 : List U8 = CallByName Str.12 Json.86;
+    let Json.368 : List U8 = CallByName List.8 Json.371 Json.372;
+    let Json.370 : I32 = 34i64;
+    let Json.369 : U8 = CallByName Num.123 Json.370;
+    let Json.367 : List U8 = CallByName List.4 Json.368 Json.369;
+    ret Json.367;
 
 procedure List.133 (List.134, List.135, #Attr.12):
     let List.132 : {} = StructAtIndex 0 #Attr.12;
-    let List.447 : {List U8, U64} = CallByName Json.97 List.134 List.135;
+    let List.447 : {List U8, U64} = CallByName Json.119 List.134 List.135;
     let List.446 : [C [], C {List U8, U64}] = TagId(1) List.447;
     ret List.446;
 
diff --git a/crates/glue/Cargo.toml b/crates/glue/Cargo.toml
index 83edbdf567..7f544dd57d 100644
--- a/crates/glue/Cargo.toml
+++ b/crates/glue/Cargo.toml
@@ -6,7 +6,7 @@ license = "UPL-1.0"
 edition = "2021"
 
 [dependencies]
-roc_std = { path = "../roc_std" }
+roc_std = { path = "../roc_std"}
 roc_can = { path = "../compiler/can" }
 roc_mono = { path = "../compiler/mono" }
 roc_load = { path = "../compiler/load" }
diff --git a/crates/repl_cli/Cargo.toml b/crates/repl_cli/Cargo.toml
index a3fb73fc02..5e4c0310d8 100644
--- a/crates/repl_cli/Cargo.toml
+++ b/crates/repl_cli/Cargo.toml
@@ -32,7 +32,7 @@ roc_mono = {path = "../compiler/mono"}
 roc_parse = {path = "../compiler/parse"}
 roc_repl_eval = {path = "../repl_eval"}
 roc_reporting = {path = "../reporting"}
-roc_std = {path = "../roc_std", default-features = false}
+roc_std = {path = "../roc_std"}
 roc_target = {path = "../compiler/roc_target"}
 roc_types = {path = "../compiler/types"}
 roc_region = { path = "../compiler/region" }
diff --git a/crates/repl_eval/Cargo.toml b/crates/repl_eval/Cargo.toml
index 3f21f92a0f..1d8a38b5d6 100644
--- a/crates/repl_eval/Cargo.toml
+++ b/crates/repl_eval/Cargo.toml
@@ -20,6 +20,6 @@ roc_mono = {path = "../compiler/mono"}
 roc_parse = {path = "../compiler/parse"}
 roc_region = {path = "../compiler/region"}
 roc_reporting = {path = "../reporting"}
-roc_std = {path = "../roc_std", default-features = false}
+roc_std = {path = "../roc_std"}
 roc_target = {path = "../compiler/roc_target"}
 roc_types = {path = "../compiler/types"}
diff --git a/crates/repl_expect/Cargo.toml b/crates/repl_expect/Cargo.toml
index 922f2a30e4..7113bfa135 100644
--- a/crates/repl_expect/Cargo.toml
+++ b/crates/repl_expect/Cargo.toml
@@ -17,7 +17,7 @@ roc_parse = {path = "../compiler/parse"}
 roc_module = {path = "../compiler/module"}
 roc_repl_eval = {path = "../repl_eval"}
 roc_reporting = {path = "../reporting"}
-roc_std = {path = "../roc_std", default-features = false}
+roc_std = {path = "../roc_std"}
 roc_target = {path = "../compiler/roc_target"}
 roc_types = {path = "../compiler/types"}
 roc_gen_llvm = {path = "../compiler/gen_llvm"}
diff --git a/crates/repl_expect/src/run.rs b/crates/repl_expect/src/run.rs
index fef58f5117..86af7f5757 100644
--- a/crates/repl_expect/src/run.rs
+++ b/crates/repl_expect/src/run.rs
@@ -341,10 +341,11 @@ pub fn expect_mono_module_to_dylib<'a>(
 
     // Verify the module
     if let Err(errors) = env.module.verify() {
-        env.module.print_to_file("/tmp/test.ll").unwrap();
+        let path = std::env::temp_dir().join("test.ll");
+        env.module.print_to_file(&path).unwrap();
         panic!(
-            "Errors defining module:\n{}\n\nUncomment things nearby to see more details. IR written to `/tmp/test.ll`",
-            errors.to_string()
+            "Errors defining module:\n{}\n\nUncomment things nearby to see more details. IR written to `{:?}`",
+            errors.to_string(), path,
         );
     }
 
diff --git a/crates/repl_test/src/wasm.rs b/crates/repl_test/src/wasm.rs
index b7d862afd9..57d722bcd0 100644
--- a/crates/repl_test/src/wasm.rs
+++ b/crates/repl_test/src/wasm.rs
@@ -96,9 +96,9 @@ fn wasmer_create_app(app_bytes_ptr: u32, app_bytes_len: u32) -> u32 {
             Err(e) => {
                 println!("Failed to create Wasm module\n{:?}", e);
                 if false {
-                    let path = "/tmp/roc_repl_test_invalid_app.wasm";
-                    fs::write(path, app_module_bytes).unwrap();
-                    println!("Wrote invalid wasm to {}", path);
+                    let path = std::env::temp_dir().join("roc_repl_test_invalid_app.wasm");
+                    fs::write(&path, app_module_bytes).unwrap();
+                    println!("Wrote invalid wasm to {:?}", path);
                 }
                 return false.into();
             }
diff --git a/crates/roc_std/Cargo.toml b/crates/roc_std/Cargo.toml
index 37a35c6672..b8d8ec4538 100644
--- a/crates/roc_std/Cargo.toml
+++ b/crates/roc_std/Cargo.toml
@@ -20,6 +20,4 @@ quickcheck_macros = "1.0.0"
 libc = "0.2.106"
 
 [features]
-default = ["platform"]
-platform = []
-no_std = []
+std = []
diff --git a/crates/roc_std/src/lib.rs b/crates/roc_std/src/lib.rs
index b385c575d9..7a0a10d988 100644
--- a/crates/roc_std/src/lib.rs
+++ b/crates/roc_std/src/lib.rs
@@ -1,6 +1,7 @@
+#![no_std]
 #![crate_type = "lib"]
-#![cfg_attr(feature = "no_std", no_std)]
 
+use arrayvec::ArrayString;
 use core::cmp::Ordering;
 use core::ffi::c_void;
 use core::fmt::{self, Debug};
@@ -9,8 +10,6 @@ use core::mem::{ManuallyDrop, MaybeUninit};
 use core::ops::Drop;
 use core::str;
 
-use arrayvec::ArrayString;
-
 mod roc_box;
 mod roc_list;
 mod roc_str;
@@ -22,7 +21,6 @@ pub use roc_str::{InteriorNulError, RocStr};
 pub use storage::Storage;
 
 // A list of C functions that are being imported
-#[cfg(feature = "platform")]
 extern "C" {
     pub fn roc_alloc(size: usize, alignment: u32) -> *mut c_void;
     pub fn roc_realloc(
@@ -37,57 +35,6 @@ extern "C" {
     pub fn roc_memset(dst: *mut c_void, c: i32, n: usize) -> *mut c_void;
 }
 
-/// # Safety
-/// This is only marked unsafe to typecheck without warnings in the rest of the code here.
-#[cfg(not(feature = "platform"))]
-#[no_mangle]
-pub unsafe extern "C" fn roc_alloc(_size: usize, _alignment: u32) -> *mut c_void {
-    unimplemented!("It is not valid to call roc alloc from within the compiler. Please use the \"platform\" feature if this is a platform.")
-}
-
-/// # Safety
-/// This is only marked unsafe to typecheck without warnings in the rest of the code here.
-#[cfg(not(feature = "platform"))]
-#[no_mangle]
-pub unsafe extern "C" fn roc_realloc(
-    _ptr: *mut c_void,
-    _new_size: usize,
-    _old_size: usize,
-    _alignment: u32,
-) -> *mut c_void {
-    unimplemented!("It is not valid to call roc realloc from within the compiler. Please use the \"platform\" feature if this is a platform.")
-}
-
-/// # Safety
-/// This is only marked unsafe to typecheck without warnings in the rest of the code here.
-#[cfg(not(feature = "platform"))]
-#[no_mangle]
-pub unsafe extern "C" fn roc_dealloc(_ptr: *mut c_void, _alignment: u32) {
-    unimplemented!("It is not valid to call roc dealloc from within the compiler. Please use the \"platform\" feature if this is a platform.")
-}
-
-#[cfg(not(feature = "platform"))]
-#[no_mangle]
-pub unsafe extern "C" fn roc_panic(c_ptr: *mut c_void, tag_id: u32) {
-    unimplemented!("It is not valid to call roc panic from within the compiler. Please use the \"platform\" feature if this is a platform.")
-}
-
-/// # Safety
-/// This is only marked unsafe to typecheck without warnings in the rest of the code here.
-#[cfg(not(feature = "platform"))]
-#[no_mangle]
-pub fn roc_memcpy(_dst: *mut c_void, _src: *mut c_void, _n: usize) -> *mut c_void {
-    unimplemented!("It is not valid to call roc memcpy from within the compiler. Please use the \"platform\" feature if this is a platform.")
-}
-
-/// # Safety
-/// This is only marked unsafe to typecheck without warnings in the rest of the code here.
-#[cfg(not(feature = "platform"))]
-#[no_mangle]
-pub fn roc_memset(_dst: *mut c_void, _c: i32, _n: usize) -> *mut c_void {
-    unimplemented!("It is not valid to call roc memset from within the compiler. Please use the \"platform\" feature if this is a platform.")
-}
-
 pub fn roc_alloc_refcounted<T>() -> *mut T {
     let size = core::mem::size_of::<T>();
     let align = core::mem::align_of::<T>();
@@ -373,7 +320,7 @@ impl RocDec {
     }
 
     fn to_str_helper(self, string: &mut ArrayString<{ Self::MAX_STR_LENGTH }>) -> &str {
-        use std::fmt::Write;
+        use core::fmt::Write;
 
         if self.as_i128() == 0 {
             return "0";
diff --git a/crates/roc_std/src/roc_list.rs b/crates/roc_std/src/roc_list.rs
index 319de04c7c..e0ae78ed0f 100644
--- a/crates/roc_std/src/roc_list.rs
+++ b/crates/roc_std/src/roc_list.rs
@@ -7,11 +7,11 @@ use core::{
     fmt::Debug,
     hash::Hash,
     intrinsics::copy_nonoverlapping,
+    iter::FromIterator,
     mem::{self, ManuallyDrop},
     ops::Deref,
     ptr::{self, NonNull},
 };
-use std::iter::FromIterator;
 
 use crate::{roc_alloc, roc_dealloc, roc_realloc, storage::Storage};
 
@@ -474,7 +474,7 @@ where
 
 impl<'a, T> IntoIterator for &'a RocList<T> {
     type Item = &'a T;
-    type IntoIter = std::slice::Iter<'a, T>;
+    type IntoIter = core::slice::Iter<'a, T>;
 
     fn into_iter(self) -> Self::IntoIter {
         self.as_slice().iter()
@@ -529,7 +529,7 @@ impl<T> Drop for IntoIter<T> {
 }
 
 impl<T: Hash> Hash for RocList<T> {
-    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+    fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
         // This is the same as Rust's Vec implementation, which
         // just delegates to the slice implementation. It's a bit surprising
         // that Hash::hash_slice doesn't automatically incorporate the length,
@@ -551,7 +551,7 @@ impl<T: Clone> FromIterator<T> for RocList<T> {
     {
         let iter = into.into_iter();
 
-        if std::mem::size_of::<T>() == 0 {
+        if core::mem::size_of::<T>() == 0 {
             let count = iter.count();
             return Self {
                 elements: Some(Self::elems_with_capacity(count)),
diff --git a/crates/roc_std/src/roc_str.rs b/crates/roc_std/src/roc_str.rs
index 863d33f5b0..71ace3bacd 100644
--- a/crates/roc_std/src/roc_str.rs
+++ b/crates/roc_std/src/roc_str.rs
@@ -10,8 +10,8 @@ use core::{
     ptr,
 };
 
-#[cfg(not(feature = "no_std"))]
-use std::ffi::{CStr, CString};
+#[cfg(feature = "std")]
+use core::ffi::{CStr, CString};
 
 use crate::RocList;
 
@@ -527,7 +527,7 @@ impl Deref for RocStr {
 }
 
 /// This can fail because a CStr may contain invalid UTF-8 characters
-#[cfg(not(feature = "no_std"))]
+#[cfg(feature = "std")]
 impl TryFrom<&CStr> for RocStr {
     type Error = core::str::Utf8Error;
 
@@ -537,7 +537,7 @@ impl TryFrom<&CStr> for RocStr {
 }
 
 /// This can fail because a CString may contain invalid UTF-8 characters
-#[cfg(not(feature = "no_std"))]
+#[cfg(feature = "std")]
 impl TryFrom<CString> for RocStr {
     type Error = core::str::Utf8Error;
 
diff --git a/crates/roc_std/src/storage.rs b/crates/roc_std/src/storage.rs
index c261a50b62..6bbb6d18de 100644
--- a/crates/roc_std/src/storage.rs
+++ b/crates/roc_std/src/storage.rs
@@ -8,7 +8,7 @@ use core::num::NonZeroIsize;
 const REFCOUNT_1: NonZeroIsize = unsafe { NonZeroIsize::new_unchecked(isize::MIN) };
 
 const _ASSERT_STORAGE_SIZE: () =
-    assert!(std::mem::size_of::<isize>() == std::mem::size_of::<Storage>());
+    assert!(core::mem::size_of::<isize>() == core::mem::size_of::<Storage>());
 
 #[derive(Clone, Copy, Debug)]
 pub enum Storage {
diff --git a/examples/platform-switching/zig-platform/host.zig b/examples/platform-switching/zig-platform/host.zig
index 18a1427207..d03e803047 100644
--- a/examples/platform-switching/zig-platform/host.zig
+++ b/examples/platform-switching/zig-platform/host.zig
@@ -86,30 +86,21 @@ pub fn main() u8 {
     const stdout = std.io.getStdOut().writer();
     const stderr = std.io.getStdErr().writer();
 
-    // start time
-    var ts1: std.os.timespec = undefined;
-    std.os.clock_gettime(std.os.CLOCK.REALTIME, &ts1) catch unreachable;
+    var timer = std.time.Timer.start() catch unreachable;
 
     // actually call roc to populate the callresult
     var callresult = RocStr.empty();
     roc__mainForHost_1_exposed_generic(&callresult);
 
-    // end time
-    var ts2: std.os.timespec = undefined;
-    std.os.clock_gettime(std.os.CLOCK.REALTIME, &ts2) catch unreachable;
+    const nanos = timer.read();
+    const seconds = (@intToFloat(f64, nanos) / 1_000_000_000.0);
 
     // stdout the result
     stdout.print("{s}", .{callresult.asSlice()}) catch unreachable;
 
     callresult.deinit();
 
-    const delta = to_seconds(ts2) - to_seconds(ts1);
-
-    stderr.print("runtime: {d:.3}ms\n", .{delta * 1000}) catch unreachable;
+    stderr.print("runtime: {d:.3}ms\n", .{seconds * 1000}) catch unreachable;
 
     return 0;
-}
-
-fn to_seconds(tms: std.os.timespec) f64 {
-    return @intToFloat(f64, tms.tv_sec) + (@intToFloat(f64, tms.tv_nsec) / 1_000_000_000.0);
-}
+}
\ No newline at end of file