anchor.diff: -{ lib, stdenv
  +{ lib
  +, stdenv
   , fetchurl
   , glib
   , libX11
  
positive.code:   installPhase = ''
      mkdir -p $out/bin/
      mkdir -p $out/lib64/
  
      mv usr/bin/dcvviewer $out/bin/dcvviewer
      mv usr/lib64/* $out/lib64/
  
      mkdir -p $out/libexec/dcvviewer
      mv usr/libexec/dcvviewer/dcvviewer $out/libexec/dcvviewer/dcvviewer
      patchelf \
        --set-interpreter $(cat $NIX_CC/nix-support/dynamic-linker) \
        $out/libexec/dcvviewer/dcvviewer
  
      # Fix the wrapper script to have the right basedir.
      sed -i "s#basedir=/usr#basedir=$out#" $out/bin/dcvviewer
  
      mv usr/share $out/
      ${glib.dev}/bin/glib-compile-schemas $out/share/glib-2.0/schemas
  
      # broken symlink, seems to give a warning message if i don't delete it
      rm $out/lib64/dcvviewer/gio/modules/libdconfsettings.so
    '';
  
    meta = with lib; {
      description = "High-performance remote display protocol";
      homepage = "https://aws.amazon.com/hpc/dcv/";
      license = licenses.unfree;
      platforms = platforms.linux;
      maintainers = with maintainers; [ rmcgibbo ];
    };
  }
  
negative.code: , gtk3
  , libselinux
  , libxml2
  , libffi
  , python3Packages
  , cpio
  , autoPatchelfHook
  , wrapGAppsHook
  }:
  
  stdenv.mkDerivation rec {
    pname = "nice-dcv-client";
    version = "2021.2.3797-1";
    src =
      fetchurl {
        url = "https://d1uj6qtbmh3dt5.cloudfront.net/2021.2/Clients/nice-dcv-viewer-${version}.el8.x86_64.rpm";
        sha256 = "sha256-iLz25SB5v7ghkAZOMGPmpNaPihd8ikzCQS//r1xBNRU=";
      };
  
    nativeBuildInputs = [ autoPatchelfHook wrapGAppsHook python3Packages.rpm ];
    unpackPhase = ''
      rpm2cpio $src | ${cpio}/bin/cpio -idm
    '';
  