anchor.diff:  
     installPhase = ''
       ./icm_install all /
  +
  +    wrapProgram $out/bin/icmbuild \
  +     --prefix PATH : ${ncurses}/bin
     '';
   
     meta = with stdenv.lib; {
  
positive.code:     sourceRoot=$(echo */icmake)
    '';
  
    buildInputs = [ gcc ];
  
    preConfigure = ''
  
negative.code: { stdenv, fetchFromGitHub, makeWrapper, gcc, ncurses }:
  
  stdenv.mkDerivation rec {
    name = "icmake-${version}";
  