title: brew install specific version of library and specific dependencies
body: <p>I have an issue with a package, <code>dmtx-utils</code>, that was moved to the <code>homebrew/boneyard</code>. It is actually expecting, what I believe is to be an <em>older</em> version of <code>ImageMagick</code>; something predating 7.0.4-8 (which is the current version). </p>
  
  <p>In the process of installing the various other needed packages for our workflow, we also install <code>zbar</code> - which is also dependent on <code>ImageMagick</code>.</p>
  
  <p>When installing <code>zbar</code> via <code>brew install zbar</code> it will also install the dependent <code>ImageMagick</code>, but in doing so, the latest version of <code>ImageMagick</code>. </p>
  
  <p>In this case: When installing <code>zbar</code>, how can I make <code>brew install</code> a specific version of its dependencies, like <code>ImageMagick</code>? </p>
  
  <p>Or more generally: When installing <code>package X</code>, how can I make <code>brew install</code> a specific version of its dependencies, like <code>package Y</code>?</p>
  
  <p>Thanks and best,</p>
  
  <p>Sander</p>