title: Custom houdini module path
body: <p>I need to store Houdini *.hda files on a network share. 
  This folder needs to be sourced by all users. </p>
  
  <p>Usually, for those kind of requests, I use an environment variable in <code>~/houdini17.0/houdini.env</code> like for exemple:
  <code>HOUDINI_TEMP_DIR="/my/custom/temp/path"</code></p>
  
  <p>But the issue is that I can find a solution for hda/otls files.
  Adding it to <code>HOUDINI_PATH="${HOUDINI_PATH};/my/custom/hda/path"</code> or <code>HOUDINI_OTLSCAN_PATH</code> doesn't work and worst, it seems to break other links since a few other houdini nodes aren't available anymore. </p>
  
  <p>Can someone point me to the right environnement variables? </p>