hardcode module path in error message

npm/index.js

@@ -6,5 +6,5 @@ var pathFile = path.join(__dirname, 'path.txt')
 if (fs.existsSync(pathFile)) {
   module.exports = path.join(__dirname, fs.readFileSync(pathFile, 'utf-8'))
 } else {
-  throw new Error('Electron failed to install correctly, please delete node_modules/' + path.basename(__dirname) + ' and try installing again')
+  throw new Error('Electron failed to install correctly, please delete node_modules/electron and try installing again')
 }