title: Railsinstaller trying to use unmapped drive
body: <p>After installation completes,
  the "Rails Environment configuration" window pops up:</p>
  
  <pre><code>The system cannot find the drive specified.
  # Rails Environment Configuration.
  Your git configuration is incomplete.
  user.name and user.email are required for properly using git and services such
  as GitHub ( http://github.com/ ).
  Please enter your name, for example mine is: Wayne E. Seguin
  </code></pre>
  
  <p>After setting my name, following error occurs:</p>
  
  <pre><code>error: could not lock config file H:\/.gitconfig: No such file or directory
  </code></pre>
  
  <p>Should I really have H:/ mapped to be able to install Rails?</p>
  
  <p>UPD: I looked into c:\RailsInstaller\Ruby1.9.2\setup_environment.bat and found it uses HOMEDRIVE and HOMEPATH, I had no such environment variables. I added those, still it didn't helped.</p>
  
  <p>UPD2: Still, I could run rails after installation. Meanwhile, I installed it on my virtual Ubuntu.</p>
  
  <p>UPD3: @Luis: thank you, that must be the reason. Although I have set environment variable HOMEDRIVE to correct one, still, if I run "set homedrive" in cmd, it gives out wrong value. </p>