title: "Push rejected, failed to compile Multipack app" when deploying heroku-buildpack-nodejs and heroku-buildpack-ruby-minimal
body: <p>I'm using heroku-buildpack-multi:</p>
  
  <pre><code>BUILDPACK_URL=https://github.com/ddollar/heroku-buildpack-multi.git
  </code></pre>
  
  <p>I'm trying to deploy with two buildpacks and am getting the following error:</p>
  
  <pre><code>Fetching repository, done.
  Counting objects: 6, done.
  Delta compression using up to 4 threads.
  Compressing objects: 100% (3/3), done.
  Writing objects: 100% (3/3), 325 bytes | 0 bytes/s, done.
  Total 3 (delta 2), reused 0 (delta 0)
  
  -----&gt; Fetching custom git buildpack... done
  -----&gt; Multipack app detected
  =====&gt; Downloading Buildpack: https://github.com/heroku/heroku-buildpack-nodejs.git
  
   !     Push rejected, failed to compile Multipack app
  </code></pre>
  
  <p>Here are the contents of my .buildpack</p>
  
  <pre><code>https://github.com/heroku/heroku-buildpack-nodejs.git
  https://github.com/dpiddy/heroku-buildpack-ruby-minimal.git
  </code></pre>
  
  <p>It used to be intermittent but it's now happening every time I try to deploy.</p>
  
  <p>Strangely enough, the official heroku ruby project seems to have gone missing...
  <a href="https://github.com/heroku/heroku-buildpack-ruby">https://github.com/heroku/heroku-buildpack-ruby</a></p>
  
  <p>Note that it is still on this page: <a href="https://github.com/heroku">https://github.com/heroku</a></p>