diff --git a/amalgamate.py b/amalgamate.py
index 96e5e62f..c0021b62 100644
--- a/amalgamate.py
+++ b/amalgamate.py
@@ -88,12 +88,17 @@ if sys.platform in ['linux', 'darwin']:
 
 print("amalgamated/pocketpy.h")
 
-shutil.copy("amalgamated/pocketpy.h", "plugins/flutter/src/pocketpy.h")
-shutil.copy("amalgamated/pocketpy.h", "plugins/macos/pocketpy/pocketpy.h")
+def sync(path):
+	shutil.copy("amalgamated/pocketpy.h", os.path.join(path, "pocketpy.h"))
+	with open(os.path.join(path, "pocketpy.cpp"), "wt", encoding='utf-8') as f:
+		f.write("#include \"pocketpy.h\"\n")
+
+sync("plugins/flutter/src")
+sync("plugins/macos/pocketpy")
 
 # unity plugin
 unity_ios_root = 'plugins/unity/PocketPyUnityPlugin/Assets/PocketPython/Plugins/iOS'
 if os.path.exists(unity_ios_root):
-	shutil.copy("amalgamated/pocketpy.h", unity_ios_root)
+	sync(unity_ios_root)
 
 
diff --git a/build_web.sh b/build_web.sh
index d07fa8d5..bfc5738a 100644
--- a/build_web.sh
+++ b/build_web.sh
@@ -4,4 +4,4 @@ rm -rf web/lib
 mkdir web/lib
 
 SRC=$(find src/ -name "*.cpp")
-em++ $SRC src2/lib.cpp -Iinclude/ -fno-rtti -fexceptions -O3 -sEXPORTED_FUNCTIONS=_pkpy_new_repl,_pkpy_repl_input,_pkpy_new_vm -sEXPORTED_RUNTIME_METHODS=ccall -o web/lib/pocketpy.js
\ No newline at end of file
+em++ $SRC -Iinclude/ -fno-rtti -fexceptions -O3 -sEXPORTED_FUNCTIONS=_pkpy_new_repl,_pkpy_repl_input,_pkpy_new_vm -sEXPORTED_RUNTIME_METHODS=ccall -o web/lib/pocketpy.js
\ No newline at end of file