title: App not compatible with buildpack: https://github.com/fent/node-ytdl-core.git
body: <p>Im trying to make a discord.js bot and i got to implementing music playing into it. But since i have it hosted on Heroku i needed to install the <a href="https://github.com/fent/node-ytdl-core.git" rel="nofollow noreferrer">https://github.com/fent/node-ytdl-core.git</a>
  buildpack but i get this error:</p>
  <pre><code>Build succeeded!
  -----&gt; App not compatible with buildpack: https://github.com/fent/node-ytdl-core.git
         bash: /tmp/codon/tmp/buildpacks/11443dd76ad0133018597f04ce3b59d71d136830/bin/detect: No such file or directory
         More info: https://devcenter.heroku.com/articles/buildpacks#detection-failure
   !     Push failed
  </code></pre>
  <p>Any possible solutions?</p>