anchor.diff: -{ lib, stdenv
  +{ lib
  +, stdenv
   , fetchurl
   , glib
   , libX11
  
positive.code: , gtk3
  , libselinux
  , libxml2
  , python3Packages
  , cpio
  , autoPatchelfHook
  }:
  
  stdenv.mkDerivation rec {
    pname = "nice-dcv-client";
    version = "2020.2.1737-1";
  
    src =
      fetchurl {
        url = "https://d1uj6qtbmh3dt5.cloudfront.net/2020.2/Clients/nice-dcv-viewer-${version}.el8.x86_64.rpm";
        sha256 = "sha256-SUpfHd/Btc07cfjc3zx5I5BiNatr/c4E2/mfJuU4R1E=";
      };
  
    nativeBuildInputs = [ autoPatchelfHook python3Packages.rpm ];
    unpackPhase = ''
      rpm2cpio $src | ${cpio}/bin/cpio -idm
    '';
  
negative.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
  
      # we already ship libffi.so.7
      ln -s ${lib.getLib libffi}/lib/libffi.so $out/lib64/libffi.so.6
    '';
  
    meta = with lib; {
      description = "High-performance remote display protocol";
      homepage = "https://aws.amazon.com/hpc/dcv/";
      license = licenses.unfree;
      platforms = [ "x86_64-linux" ];
      maintainers = with maintainers; [ rmcgibbo ];
    };
  }
  