anchor.diff:      # binary to be named dosbox, but get out of the way of vanilla dosbox if the user
       # desires to install that as well.
       mv $out/bin/dosbox $out/bin/${pname}
  -    cp -r ${dosbox_run} "$out/bin/dosbox"
  +    makeWrapper $out/bin/dosbox-staging $out/bin/dosbox
       cp $out/share/man/man1/dosbox.1.gz $out/share/man/man1/${pname}.1.gz
     '';
   
  
positive.code: { stdenv, lib, fetchFromGitHub, writeShellScript
  , gtest, meson, ninja, pkg-config
  , alsa-lib, fluidsynth, libGL, libGLU, libogg, libpng, munt, opusfile, SDL2, SDL2_net
  }:
  
  let
    dosbox_run = writeShellScript "dosbox" ''
      $(dirname "$0")/dosbox-staging "$@"
    '';
  
  in stdenv.mkDerivation rec {
    pname = "dosbox-staging";
    version = "0.77.1";
  
  
negative.code:     sha256 = "07jwmmm1bhfxavlhl854cj8l5iy5hqx5hpwkkjbcwqg7yh9jfs2x";
    };
  
    nativeBuildInputs = [ gtest makeWrapper meson ninja pkg-config ];
    buildInputs = [ alsa-lib fluidsynth libGL libGLU libogg libpng munt opusfile SDL2 SDL2_net ];
  
    hardeningDisable = [ "format" ];
  