args : with args; rec { version = "1.2.0"; src = fetchurl { url = "http://rubyforge.org/frs/download.php/38646/rubygems-${version}.tgz"; sha256 = "0b9ppgs9av4z344s13wp40ki72prxyz3q0hmsf5swx7xhl54bbr8"; }; buildInputs = [ruby makeWrapper]; configureFlags = []; doInstall = FullDepEntry ('' ruby setup.rb --prefix=$out/ wrapProgram $out/bin/gem --prefix RUBYLIB : $out/lib:$out/lib '') ["minInit" "addInputs" "doUnpack" "defEnsureDir"]; /* doConfigure should be specified separately */ phaseNames = ["doInstall"]; name = "rubygems-" + version; meta = { description = "Ruby gems package collection"; longDescription = '' Example usage: gem install -i .ruby-gems json ruby -I ~/.ruby-gems/gems/json-1.1.3/lib your-script.rb Probably there are better ways to handle this all. Go on and fix it. ''; }; }