Debugging with mocha fail on Appveyor

[Deleted user]

I am using devtool to debug atom-keymap. Although it success on Travis but it is failing on Appveyor:

Error: 
C:\projects\atom-keymap\node_modules\mocha\bin\_mocha
Cannot find module 'C:\projects\atom-keymap\spec\fixtures'
  at Module._resolveFilename (module.js:455:15)
  at Function.Module._resolveFilename (C:\projects\atom-keymap\node_modules\electron\dist\resources\electron.asar\common\reset-search-paths.js:35:12)
  at Function.Module._load (module.js:403:25)
  at Module.require (module.js:483:17)
  at require (internal/module.js:20:19)
  at C:\projects\atom-keymap\node_modules\mocha\lib\mocha.js:222:27
  at Array.forEach (native)
  at Mocha.loadFiles (C:\projects\atom-keymap\node_modules\mocha\lib\mocha.js:219:14)
  at Mocha.run (C:\projects\atom-keymap\node_modules\mocha\lib\mocha.js:487:10)
  at Object.<anonymous> (C:\projects\atom-keymap\node_modules\mocha\bin\_mocha:458:18)
  at Module._compile (module.js:556:32)
  at Object.devtoolCompileModule (C:\projects\atom-keymap\node_modules\devtool\lib\require-hook.js:32:14)
  at Module.load (module.js:473:32)
  at tryModuleLoad (module.js:432:12)
  at Function.Module._load (module.js:424:3)
  at Module.require (module.js:483:17)
  at require (internal/module.js:20:19)
  at EventEmitter.<anonymous> (C:\projects\atom-keymap\node_modules\devtool\lib\preload.js:88:16)
  at emitOne (events.js:96:13)
  at EventEmitter.emit (events.js:188:7)