diff --git a/crates/compiler/load/Cargo.toml b/crates/compiler/load/Cargo.toml
index 330ee5d8a5..530aeadf86 100644
--- a/crates/compiler/load/Cargo.toml
+++ b/crates/compiler/load/Cargo.toml
@@ -16,9 +16,11 @@ roc_collections = { path = "../collections" }
 roc_reporting = { path = "../../reporting" }
 
 [build-dependencies]
-roc_load_internal = { path = "../load_internal" }
 roc_builtins = { path = "../builtins" }
 roc_module = { path = "../module" }
 roc_reporting = { path = "../../reporting" }
 roc_target = { path = "../roc_target" }
 bumpalo = { version = "3.8.0", features = ["collections"] }
+
+[target.'cfg(not(windows))'.build-dependencies]
+roc_load_internal = { path = "../load_internal" }
diff --git a/crates/compiler/load/build.rs b/crates/compiler/load/build.rs
index 1fe50fea82..d663e4b03b 100644
--- a/crates/compiler/load/build.rs
+++ b/crates/compiler/load/build.rs
@@ -1,7 +1,7 @@
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 
+#[cfg(not(windows))]
 use bumpalo::Bump;
-use roc_load_internal::file::{LoadingProblem, Threading};
 use roc_module::symbol::ModuleId;
 
 const SKIP_SUBS_CACHE: bool = {
@@ -39,44 +39,63 @@ fn write_subs_for_module(module_id: ModuleId, filename: &str) {
         .join(filename);
     println!("cargo:rerun-if-changed={}", filepath.to_str().unwrap());
 
+    let mut output_path = PathBuf::from(std::env::var("OUT_DIR").unwrap());
+    output_path.extend(&[filename]);
+    output_path.set_extension("dat");
+
+    #[cfg(not(windows))]
+    if SKIP_SUBS_CACHE {
+        write_subs_for_module_dummy(&output_path)
+    } else {
+        write_subs_for_module_real(module_id, filename, &output_path)
+    }
+
+    #[cfg(windows)]
+    {
+        let _ = SKIP_SUBS_CACHE;
+        let _ = module_id;
+        write_subs_for_module_dummy(&output_path)
+    }
+}
+
+fn write_subs_for_module_dummy(output_path: &Path) {
+    // write out a dummy file
+    std::fs::write(output_path, &[]).unwrap();
+}
+
+#[cfg(not(windows))]
+fn write_subs_for_module_real(module_id: ModuleId, filename: &str, output_path: &Path) {
+    use roc_load_internal::file::{LoadingProblem, Threading};
+
     let arena = Bump::new();
     let src_dir = PathBuf::from(".");
     let source = roc_builtins::roc::module_source(module_id);
     let target_info = roc_target::TargetInfo::default_x86_64();
 
-    let mut output_path = PathBuf::from(std::env::var("OUT_DIR").unwrap());
-    output_path.extend(&[filename]);
-    output_path.set_extension("dat");
+    let res_module = roc_load_internal::file::load_and_typecheck_str(
+        &arena,
+        PathBuf::from(filename),
+        source,
+        src_dir,
+        Default::default(),
+        target_info,
+        roc_reporting::report::RenderTarget::ColorTerminal,
+        Threading::AllAvailable,
+    );
 
-    if SKIP_SUBS_CACHE {
-        // write out a dummy file
-        std::fs::write(output_path, &[]).unwrap();
-    } else {
-        let res_module = roc_load_internal::file::load_and_typecheck_str(
-            &arena,
-            PathBuf::from(filename),
-            source,
-            src_dir,
-            Default::default(),
-            target_info,
-            roc_reporting::report::RenderTarget::ColorTerminal,
-            Threading::AllAvailable,
-        );
+    let module = match res_module {
+        Ok(v) => v,
+        Err(LoadingProblem::FormattedReport(report)) => {
+            panic!("{}", report);
+        }
+        Err(other) => {
+            panic!("build_file failed with error:\n{:?}", other);
+        }
+    };
 
-        let module = match res_module {
-            Ok(v) => v,
-            Err(LoadingProblem::FormattedReport(report)) => {
-                panic!("{}", report);
-            }
-            Err(other) => {
-                panic!("build_file failed with error:\n{:?}", other);
-            }
-        };
+    let subs = module.solved.inner();
+    let exposed_vars_by_symbol: Vec<_> = module.exposed_to_host.into_iter().collect();
 
-        let subs = module.solved.inner();
-        let exposed_vars_by_symbol: Vec<_> = module.exposed_to_host.into_iter().collect();
-
-        let mut file = std::fs::File::create(&output_path).unwrap();
-        subs.serialize(&exposed_vars_by_symbol, &mut file).unwrap();
-    }
+    let mut file = std::fs::File::create(&output_path).unwrap();
+    subs.serialize(&exposed_vars_by_symbol, &mut file).unwrap();
 }