diff --git a/.gitignore b/.gitignore
index 79fbf7c..a72b52e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,7 +10,6 @@ lib-cov
 pids
 logs
 results
-lib
 
 npm-debug.log
 node_modules
diff --git a/lib/rcedit.js b/lib/rcedit.js
new file mode 100644
index 0000000..fadfecd
--- /dev/null
+++ b/lib/rcedit.js
@@ -0,0 +1,56 @@
+var pairSettings, path, singleSettings, spawn;
+
+path = require('path');
+
+spawn = require('child_process').spawn;
+
+pairSettings = ['version-string'];
+
+singleSettings = ['file-version', 'product-version', 'icon'];
+
+module.exports = function(exe, options, callback) {
+  var args, child, error, key, name, rcedit, stderr, value, _i, _j, _len, _len1, _ref;
+  rcedit = path.resolve(__dirname, '..', 'bin', 'rcedit.exe');
+  args = [exe];
+  for (_i = 0, _len = pairSettings.length; _i < _len; _i++) {
+    name = pairSettings[_i];
+    if (options[name] != null) {
+      _ref = options[name];
+      for (key in _ref) {
+        value = _ref[key];
+        args.push("--set-" + name);
+        args.push(key);
+        args.push(value);
+      }
+    }
+  }
+  for (_j = 0, _len1 = singleSettings.length; _j < _len1; _j++) {
+    name = singleSettings[_j];
+    if (options[name] != null) {
+      args.push("--set-" + name);
+      args.push(options[name]);
+    }
+  }
+  if (process.platform !== "win32") {
+    args.unshift(rcedit);
+    rcedit = "wine";
+  }
+  child = spawn(rcedit, args);
+  stderr = '';
+  error = null;
+  child.on('error', function(err) {
+    return error != null ? error : error = err;
+  });
+  child.stderr.on('data', function(data) {
+    return stderr += data;
+  });
+  return child.on('close', function(code) {
+    if (error != null) {
+      return callback(error);
+    } else if (code === 0) {
+      return callback(null);
+    } else {
+      return callback(stderr);
+    }
+  });
+};
diff --git a/src/rcedit.coffee b/src/rcedit.coffee
deleted file mode 100644
index 3ab73cb..0000000
--- a/src/rcedit.coffee
+++ /dev/null
@@ -1,39 +0,0 @@
-path = require 'path'
-{spawn} = require 'child_process'
-
-pairSettings = ['version-string']
-singleSettings = ['file-version', 'product-version', 'icon']
-
-module.exports = (exe, options, callback) ->
-  rcedit = path.resolve __dirname, '..', 'bin', 'rcedit.exe'
-  args = [exe]
-
-  for name in pairSettings
-    if options[name]?
-      for key, value of options[name]
-        args.push "--set-#{name}"
-        args.push key
-        args.push value
-
-  for name in singleSettings
-    if options[name]?
-      args.push "--set-#{name}"
-      args.push options[name]
-
-  if process.platform != "win32"
-    args.unshift(rcedit)
-    rcedit = "wine"
-
-  child = spawn rcedit, args
-
-  stderr = ''
-  error = null
-  child.on 'error', (err) -> error ?= err
-  child.stderr.on 'data', (data) -> stderr += data
-  child.on 'close', (code) ->
-    if error?
-      callback error
-    else if code is 0
-      callback null
-    else
-      callback stderr