anchor.diff:  
   let
   
  -  version = "2.2.1287";
  +  version = "2.2.1373";
   
     rpath = stdenv.lib.makeSearchPath "lib" [
       stdenv.glibc
  
positive.code:     mv opt/HipChat/bin/linuxbrowserlaunch $out/libexec/hipchat/bin/
    '';
  
    meta = {
      description = "Desktop client for HipChat services";
      homepage = http://www.hipchat.com;
      license = stdenv.lib.licenses.unfree;
      platforms = [ "i686-linux" "x86_64-linux" ];
    };
  }
  
negative.code:     if stdenv.system == "x86_64-linux" then
        fetchurl {
          url = "http://downloads.hipchat.com/linux/arch/x86_64/hipchat-${version}-x86_64.pkg.tar.xz";
          sha256 = "0mxjzigncp8sh5w2rpr7kvkiahagm3adss1zv6rqk8hc1awrnd8n";
        }
      else if stdenv.system == "i686-linux" then
        fetchurl {
          url = "http://downloads.hipchat.com/linux/arch/i686/hipchat-${version}-i686.pkg.tar.xz";
          sha256 = "1f4cjbazgifxpyr6589frs417h4wpxbykf46w5qiw0m2wiqpqff5";
        }
      else
        throw "HipChat is not supported on ${stdenv.system}";
  