diff --git a/lib/bundle.js b/lib/bundle.js
index d46751b..e13bded 100644
--- a/lib/bundle.js
+++ b/lib/bundle.js
@@ -39,11 +39,18 @@ _log     = require("./log");
  * @param {function} complete - next function to call (async)
  **/
 function bundle (input, nc, complete) {
+  var igv = '__filename,__dirname';
+  insertGlobalVars = igv.split(',').reduce(function (vars, x) { // borrowed from browserify
+    vars[x] = insertGlobals.vars[x];
+    return vars;
+  }, {});
+
   var b = browserify(input, {
     builtins: false,
     commondir:false,
     detectGlobals: false,
     insertGlobals: '__filename,__dirname',
+    insertGlobalVars: insertGlobalVars,
     browserField: false
   });
   var bundlePath = path.join(nc, "lib", "nexe.js");