anchor.diff:    meta = {
       description = "An open-source, cycle-accurate Nintendo multi-system emulator";
       longDescription = ''
  -      Higan (formerly bsnes) is a Nintendo multi-system emulator.
  +      Higan (formerly bsnes) is a multi-system game console emulator.
         It currently supports the following systems:
           - Nintendo's Famicom, Super Famicom (with subsystems: 
             Super Game Boy, BS-X Satellaview, Sufami Turbo); 
  
positive.code: stdenv.mkDerivation rec {
  
    name = "higan-${version}";
    version = "102";
    sourceName = "higan_v${version}-source";
  
    src = fetchurl {
      urls = [ "http://download.byuu.org/${sourceName}.7z" ];
      sha256 = "1wcr2sxk0n4rngnf9g2qcjcv70s8rf5cqj195sav1yjwxkrdrnjj";
      curlOpts = "--user-agent 'Mozilla/5.0'"; # the good old user-agent trick...
    };
  
  
negative.code:     cat <<EOF > $out/bin/higan-init.sh
      #!${stdenv.shell}
  
      cp --recursive --update $out/share/higan/*.sys \$HOME/.local/share/higan/
  
      EOF
  