title: homebrew install hangs on mac
body: <p>I can't figure this one out when I try to install rvm it just hangs (on mac 10.8.5):</p>
  
  <pre><code>Installing required packages: libksba....
  </code></pre>
  
  <p>Doing a cntrl+c i can see in the log:</p>
  
  <pre><code>current path: /Users/markewest/.rvm/src/rvm
  command(2): requirements_osx_brew_libs_install libksba
  Error: No such keg: /usr/local/Cellar/libksba
  ==&gt; Installing dependencies for libksba: libgpg-error
  ==&gt; Installing libksba dependency: libgpg-error
  ==&gt; Downloading ftp://ftp.gnupg.org/gcrypt/libgpg-error/libgpg-error-1.12.tar.bz2
  </code></pre>
  
  <p>I have tried manually installing "libgpg-error" and it doesn't seem to help. Any ideas?</p>
  
  <p>Edit:  Tried the below suggestion but it gets stuck. Nothing ever download, it shows below (after letting it sit for 1 hour):</p>
  
  <pre><code>==&gt; Installing dependencies for libksba: libgpg-error
  ==&gt; Installing libksba dependency: libgpg-error
  ==&gt; Downloading ftp://ftp.gnupg.org/gcrypt/libgpg-error/libgpg-error-1.12.tar.bz2
  </code></pre>