anchor.diff:      wrapProgram $out/bin/tkremind --set TCLLIBPATH "${tclLibPaths}"
     '';
   
  -  meta = {
  +  meta = with lib; {
       homepage = "https://dianne.skoll.ca/projects/remind/";
       description = "Sophisticated calendar and alarm program for the console";
  -    license = lib.licenses.gpl2;
  -    maintainers = with lib.maintainers; [raskin kovirobi];
  -    platforms = with lib.platforms; unix;
  +    license = licenses.gpl2Only;
  +    maintainers = with maintainers; [ raskin kovirobi ];
  +    platforms = platforms.unix;
     };
   }
  
positive.code: {lib, stdenv, fetchurl, tk, tcllib, makeWrapper
  , tkremind ? true
  } :
  
  assert tkremind -> tk != null;
  assert tkremind -> tcllib != null;
  
negative.code:   tkremindPatch = optionalString tkremind ''
      substituteInPlace scripts/tkremind --replace "exec wish" "exec ${tk}/bin/wish"
    '';
  in
  stdenv.mkDerivation rec {
    pname = "remind";
    version = "03.03.06";
  
    src = fetchurl {
      url = "https://dianne.skoll.ca/projects/remind/download/remind-${version}.tar.gz";
      sha256 = "sha256-lpoMAXDJxwODY0/aoo25GRBYWFhE4uf11pR5/ITZX1s=";
    };
  
    nativeBuildInputs = optional tkremind makeWrapper;
  