diff --git a/nixos.just b/nixos.just
index b0daa3d..ffd1de2 100644
--- a/nixos.just
+++ b/nixos.just
@@ -151,6 +151,7 @@ build module="__help" target="fail" mode="aot":
 
     just clean {{ module }}
     just create-build-dir {{ module }}
+    just copy-c-module {{ module }}
 
     if [ "{{ mode }}" = "aot" ]; then
         just build-wasm-module {{ module }}
diff --git a/wasm.just b/wasm.just
index 9cdc234..1b9eb32 100644
--- a/wasm.just
+++ b/wasm.just
@@ -101,6 +101,9 @@ build-c-module module target="fail":
         exit 1
     fi
 
+copy-c-module module:
+    cp targets/wasm-module/{{ module }}.cpp {{ BUILD_DIR }}-{{ module }}/wasm-module.cpp
+
 # =================================================================================================================== #
 # Host program recipes
 # =================================================================================================================== #