diff --git a/flake.nix b/flake.nix
index d736e8e..d3f6b75 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,7 +27,7 @@
       {
 			  flake = {
 					lib = {
-						rustZome = { src, crate, holochain, excludedCrates ? [] }: 
+						rustZome = { src, crate, holochain, workspacePath, optimizeWasm ? true, excludedCrates ? [] }: 
 							let 
 							  system = holochain.devShells.holonix.system;
 							  pkgs = import inputs.nixpkgs {
@@ -44,7 +44,7 @@
 
 							in
 								pkgs.callPackage ./nix/zome.nix {
-					        inherit src craneLib crate excludedCrates;
+					        inherit src craneLib crate excludedCrates workspacePath optimizeWasm;
 					      };
 						dna = { holochain, dnaManifest, zomes }: 
 							let 
diff --git a/nix/zome.nix b/nix/zome.nix
index 69688d6..60c445e 100644
--- a/nix/zome.nix
+++ b/nix/zome.nix
@@ -3,19 +3,21 @@
 	stdenv,
 	binaryen,
   craneLib,
-  src,
-	excludedCrates ? []
+  workspacePath,
+	excludedCrates,
+	optimizeWasm
 }:
 
 let 
 	cargoExtraArgs = "--workspace ${if excludedCrates != null then builtins.concatStringsSep " " (builtins.map (excludedCrate: ''--exclude ${excludedCrate}'') excludedCrates) else ''''}";
   wasmDeps = craneLib.buildDepsOnly {
-		inherit src cargoExtraArgs;
+		inherit cargoExtraArgs;
+	  src = craneLib.cleanCargoSource (craneLib.path workspacePath);
 	  CARGO_BUILD_TARGET = "wasm32-unknown-unknown";
 		doCheck = false;
 	};
 	wasm = craneLib.buildPackage {
-		inherit src;
+	  src = craneLib.cleanCargoSource (craneLib.path workspacePath);
 	  CARGO_BUILD_TARGET = "wasm32-unknown-unknown";
 		cargoArtifacts = wasmDeps;
 		cargoExtraArgs = "-p ${crate} --locked";
@@ -23,11 +25,21 @@ let
 		doCheck = false;
 	};
 in
-  stdenv.mkDerivation {
-	  name = crate;
-		buildInputs = [ wasm binaryen ];
-		phases = [ "buildPhase" ];
-		buildPhase = ''
-		  wasm-opt --strip-debug -Oz -o $out ${wasm}/lib/${crate}.wasm
- 		'';
-	}
+  if optimizeWasm then
+	  stdenv.mkDerivation {
+		  name = crate;
+			buildInputs = [ wasm binaryen ];
+			phases = [ "buildPhase" ];
+			buildPhase = ''
+			  wasm-opt --strip-debug -Oz -o $out ${wasm}/lib/${crate}.wasm
+	 		'';
+		}
+	else
+	  stdenv.mkDerivation {
+		  name = crate;
+			buildInputs = [ wasm ];
+			phases = [ "buildPhase" ];
+			buildPhase = ''
+			  cp ${wasm}/lib/${crate}.wasm $out 
+	 		'';
+		}