diff --git a/examples/balance/.gitignore b/examples/balance/.gitignore
new file mode 100644
index 0000000000..ba2906d066
--- /dev/null
+++ b/examples/balance/.gitignore
@@ -0,0 +1 @@
+main
diff --git a/examples/balance/Main.roc b/examples/balance/Main.roc
index bb87fb29b2..441dfb50f3 100644
--- a/examples/balance/Main.roc
+++ b/examples/balance/Main.roc
@@ -1,7 +1,7 @@
-app Main provides [ rocMain ] imports [ Effect ]
+app "main" imports [ Effect ] provides [ rocMain ] to "./platform"
+
 
 rocMain : Effect.Effect {} as Fx
 rocMain =
     when List.len (Str.split "hello" "JJJJ there") is
         _  -> Effect.putLine "Yay"
-
diff --git a/examples/balance/platform/Pkg-Config.roc b/examples/balance/platform/Pkg-Config.roc
index a463e3bbb9..0d66513ebe 100644
--- a/examples/balance/platform/Pkg-Config.roc
+++ b/examples/balance/platform/Pkg-Config.roc
@@ -1,7 +1,9 @@
 platform folkertdev/foo
-    provides [ mainForHost ]
-    requires { main : Effect {} }
+    requires { rocMain : Effect {} }
+    exposes []
+    packages {}
     imports []
+    provides [ mainForHost ]
     effects Effect
         {
             putChar : Int -> Effect {},
@@ -10,4 +12,4 @@ platform folkertdev/foo
         }
 
 mainForHost : Effect {} as Fx
-mainForHost = main
+mainForHost = rocMain
diff --git a/examples/balance/platform/src/lib.rs b/examples/balance/platform/src/lib.rs
index 61957ea485..0aa8e17445 100644
--- a/examples/balance/platform/src/lib.rs
+++ b/examples/balance/platform/src/lib.rs
@@ -7,16 +7,16 @@ use std::alloc::Layout;
 use std::time::SystemTime;
 
 extern "C" {
-    #[link_name = "Main_rocMain_1_exposed"]
+    #[link_name = "roc__rocMain_1_exposed"]
     fn roc_main(output: *mut u8) -> ();
 
-    #[link_name = "Main_rocMain_1_size"]
+    #[link_name = "roc__rocMain_1_size"]
     fn roc_main_size() -> i64;
 
-    #[link_name = "Main_rocMain_1_Fx_caller"]
+    #[link_name = "roc__rocMain_1_Fx_caller"]
     fn call_Fx(function_pointer: *const u8, closure_data: *const u8, output: *mut u8) -> ();
 
-    #[link_name = "Main_rocMain_1_Fx_size"]
+    #[link_name = "roc__rocMain_1_Fx_size"]
     fn size_Fx() -> i64;
 }
 
@@ -62,11 +62,10 @@ unsafe fn call_the_closure(function_pointer: *const u8, closure_data_ptr: *const
 
         let output = &*(buffer as *mut RocCallResult<i64>);
 
-        //        match output.into() {
-        //            Ok(v) => v,
-        //            Err(e) => panic!("failed with {}", e),
-        //        }
-        32
+        match output.into() {
+            Ok(_) => 0,
+            Err(e) => panic!("failed with {}", e),
+        }
     })
 }
 
@@ -96,7 +95,12 @@ pub fn rust_main() -> isize {
 
                 let closure_data_ptr = buffer.offset(16);
 
-                call_the_closure(function_pointer as *const u8, closure_data_ptr as *const u8)
+                let result =
+                    call_the_closure(function_pointer as *const u8, closure_data_ptr as *const u8);
+
+                std::alloc::dealloc(buffer, layout);
+
+                result
             }
             Err(msg) => {
                 std::alloc::dealloc(buffer, layout);
diff --git a/examples/closure/.gitignore b/examples/closure/.gitignore
new file mode 100644
index 0000000000..3b89e1b9f3
--- /dev/null
+++ b/examples/closure/.gitignore
@@ -0,0 +1 @@
+closure
diff --git a/examples/closure/platform/src/lib.rs b/examples/closure/platform/src/lib.rs
index b442d4d4e7..bbaca0733a 100644
--- a/examples/closure/platform/src/lib.rs
+++ b/examples/closure/platform/src/lib.rs
@@ -1,19 +1,21 @@
+#![allow(non_snake_case)]
+
 use roc_std::alloca;
 use roc_std::RocCallResult;
 use std::alloc::Layout;
 use std::time::SystemTime;
 
 extern "C" {
-    #[link_name = "Main_makeClosure_1_exposed"]
+    #[link_name = "roc__makeClosure_1_exposed"]
     fn make_closure(output: *mut u8) -> ();
 
-    #[link_name = "Main_makeClosure_1_size"]
+    #[link_name = "roc__makeClosure_1_size"]
     fn closure_size() -> i64;
 
-    #[link_name = "Main_makeClosure_1_MyClosure_caller"]
+    #[link_name = "roc__makeClosure_1_MyClosure_caller"]
     fn call_MyClosure(function_pointer: *const u8, closure_data: *const u8, output: *mut u8) -> ();
 
-    #[link_name = "Main_makeClosure_1_MyClosure_size"]
+    #[link_name = "roc__makeClosure_1_MyClosure_size"]
     fn size_MyClosure() -> i64;
 }
 
@@ -65,7 +67,12 @@ pub fn rust_main() -> isize {
 
                 let closure_data_ptr = buffer.offset(16);
 
-                call_the_closure(function_pointer as *const u8, closure_data_ptr as *const u8)
+                let result =
+                    call_the_closure(function_pointer as *const u8, closure_data_ptr as *const u8);
+
+                std::alloc::dealloc(buffer, layout);
+
+                result
             }
             Err(msg) => {
                 std::alloc::dealloc(buffer, layout);
@@ -80,7 +87,6 @@ pub fn rust_main() -> isize {
     println!(
         "Roc closure took {:.4} ms to compute this answer: {:?}",
         duration.as_secs_f64() * 1000.0,
-        // truncate the answer, so stdout is not swamped
         answer
     );
 
diff --git a/examples/effect/.gitignore b/examples/effect/.gitignore
new file mode 100644
index 0000000000..ffc7415330
--- /dev/null
+++ b/examples/effect/.gitignore
@@ -0,0 +1 @@
+effect-example
diff --git a/examples/shared-quicksort/.gitignore b/examples/shared-quicksort/.gitignore
new file mode 100644
index 0000000000..19abff6005
--- /dev/null
+++ b/examples/shared-quicksort/.gitignore
@@ -0,0 +1 @@
+quicksort
diff --git a/examples/shared-quicksort/platform/src/lib.rs b/examples/shared-quicksort/platform/src/lib.rs
index 85d5c80781..974dc2592c 100644
--- a/examples/shared-quicksort/platform/src/lib.rs
+++ b/examples/shared-quicksort/platform/src/lib.rs
@@ -1,9 +1,11 @@
+#![allow(non_snake_case)]
+
 use roc_std::RocCallResult;
 use roc_std::RocList;
 use std::time::SystemTime;
 
 extern "C" {
-    #[link_name = "_quicksort_1_exposed"]
+    #[link_name = "roc__quicksort_1_exposed"]
     fn quicksort(list: RocList<i64>, output: &mut RocCallResult<RocList<i64>>) -> ();
 }