title: error installing xen-api-sdk using opam : No package named xen-api-sdk found
body: <p>I have been following the steps given <a href="https://github.com/xapi-project/xen-api-sdk/blob/master/README.md" rel="nofollow noreferrer">at this git repo</a> for getting up and running with XenAPI java program. I have successfully completed <a href="https://github.com/xapi-project/xen-api-sdk/blob/master/README.md#1-environment-setup" rel="nofollow noreferrer">first step</a> using <code>brew</code>.</p>
  
  <p>however when I try to install <code>xen-api-sdk</code> dependency as given in <a href="https://github.com/xapi-project/xen-api-sdk/blob/master/README.md#2-install-dependencies" rel="nofollow noreferrer">second step</a></p>
  
  <pre><code>opam depext -y xen-api-sdk
  </code></pre>
  
  <p>I get this error </p>
  
  <pre><code> Detecting depexts using flags: x86_64 osx homebrew
   [ERROR] No package named xen-api-sdk found.
   [ERROR] No package named xen-api-sdk found.
   No extra OS packages requirements found.
  </code></pre>
  
  <p>Also, I have this command </p>
  
  <pre><code> opam install -y --deps-only xen-api-sdk
  </code></pre>
  
  <p>I get the following error</p>
  
  <pre><code>[ERROR] No package named xen-api-sdk found
  </code></pre>
  
  <p>Also this package is not available at <a href="https://opam.ocaml.org/packages/index-date.html" rel="nofollow noreferrer">opam repository store</a></p>