So siehts ganz gut aus !

node_modules/pug/register.js

@@ -0,0 +1,13 @@
+var pug = require('./');
+var resolvedPug = JSON.stringify(require.resolve('./'));
+
+function compileTemplate(module, filename) {
+  var template = pug.compileFileClient(filename, {inlineRuntimeFunctions: false});
+  var body = "var pug = require(" + resolvedPug + ").runtime;\n\n" +
+             "module.exports = " + template + ";";
+  module._compile(body, filename);
+}
+
+if (require.extensions) {
+  require.extensions['.pug'] = compileTemplate
+};