anchor.diff:      libpthreadstubs
       libsndfile
       libtiff
  -    giflib
       libxcb
       mkfontdir
       pcre
     ];
   
  -  cmakeFlags = [ "-DPREFIX=$out" "-DCFGDIR=/etc/icewm" ];
  +  cmakeFlags = [
  +    "-DPREFIX=$out"
  +    "-DCFGDIR=/etc/icewm"
  +  ];
   
     # install legacy themes
     postInstall = ''
  
positive.code: { lib
  , stdenv
  , fetchFromGitHub
  , cmake
  , pkg-config
  , asciidoc
  , expat
  , fontconfig
  , freetype
  
negative.code: , libpthreadstubs
  , libsndfile
  , libtiff
  , libxcb
  , mkfontdir
  , pcre
  , perl
  , pkg-config
  }:
  
  stdenv.mkDerivation rec {
    pname = "icewm";
    version = "2.6.0";
  
    src = fetchFromGitHub {
      owner  = "ice-wm";
      repo = pname;
      rev = version;
      hash = "sha256-R06tiWS9z6K5Nbi+vvk7DyozpcFdrHleMeh7Iq/FfHQ=";
    };
  
    nativeBuildInputs = [
  