anchor.diff:      sh $src --keep --noexec
       cd pkg/run_files
       sh cuda-linux64-rel-5.5.22-16488124.run --keep --noexec
  +    sh cuda-samples-linux-5.5.22-16488124.run --keep --noexec
       cd pkg
     '';
   
  
positive.code:   '';
  
    installPhase = ''
      mkdir $out
      perl ./install-linux.pl --prefix="$out"
    '';
  
    meta = {
  
negative.code:       }
      else throw "cudatoolkit does not support platform ${stdenv.system}";
  
    outputs = [ "out" "sdk" ];
  
    buildInputs = [ perl ];
  
    runtimeDependencies = [
  