diff --git a/emscripten/buildToolkit b/emscripten/buildToolkit
index eafadbd5fda..182f7c9cccb 100755
--- a/emscripten/buildToolkit
+++ b/emscripten/buildToolkit
@@ -207,8 +207,8 @@ if ($? == 0) {
 	# the wrapper is necessary with closure 1 for avoiding to conflict with globals
 	`cat $BUILD_DIR/verovio.js verovio-js-start.js verovio-proxy.js > $BUILD_DIR/$FILENAME`;
 
-	# wrap the npm package (but not with wasm build for now)
-	if (!$wasmQ) {
+	# wrap the npm package (but not with wasm build and without humdrum for now)
+	if (!$wasmQ && !$lightQ && $nohumdrum) {
 		print "Building $NPM package\n";
 		# the cat order is different for the npm package because we want to wrap the Module in the init function
 		`cat verovio-npm-start.js $BUILD_DIR/verovio.js verovio-proxy.js verovio-npm-end.js > $NPM/index.js`;
diff --git a/emscripten/verovio-npm-end.js b/emscripten/verovio-npm-end.js
index 1ea41ba753b..e90e868f98b 100644
--- a/emscripten/verovio-npm-end.js
+++ b/emscripten/verovio-npm-end.js
@@ -1,21 +1,3 @@
-	// ... verovio-proxy.js preceed
-	
-	//console.log(Module.getMemory());
-	
-	// Check what to return - an instance, or the contructor method
-	if (createInstance) {
-		return new verovio.toolkit();
-	}
-	else {
-		return { toolkit:verovio.toolkit };	
-	}
-}
 
-// Minimal function
-verovio.toolkit = function() {
-	return init(0, true);
-}
-
-// Both exports
 module.exports = { toolkit:verovio.toolkit };
-module.exports.init = init;
+
diff --git a/emscripten/verovio-npm-start.js b/emscripten/verovio-npm-start.js
index ed0279e18be..29a5dd5885c 100644
--- a/emscripten/verovio-npm-start.js
+++ b/emscripten/verovio-npm-start.js
@@ -1,29 +1,2 @@
 
 var verovio = verovio || {};
-
-/*  beginning of the init function that adjsut the memory (if required) and load the module */
-
-init = function (memory, createInstance = false) {
-	
-	// If we ask for creating an instance are already have one, just call the contructor
-	if (createInstance && verovio.ptr != undefined) {
-		return new verovio.toolkit();
-	}
-	
-	var Module;if(typeof Module==="undefined")Module={};
-	if (memory > 0) {
-		if (memory < 256) {
-			console.warn("Memory setting ignore because it should be at least 256");
-		}
-		else if (memory >= 1024) {
-			console.warn("Memory setting ignored because it should be less than 1024");
-		}
-		else {
-			Module.TOTAL_MEMORY = 2*memory*1024*1024;
-			Module.TOTAL_STACK = memory*1024*1024;
-			console.info("Maxmimum memory increased to " + memory + "MB");
-		}
-	}
-	
-	// The verovio-proxy.js	follows...
-	
\ No newline at end of file