anchor.diff:      "--disable-profiling"
       "--disable-static-qt"
       "--enable-optimization"
  -    "--with-boost-libdir=${boost.out}/lib"
  +    "--with-boost-libdir=${lib.getLib boost}/lib"
       "--with-docbook-xsl-root=${docbook_xsl}/share/xml/docbook-xsl"
       "--with-gettext"
       (enableFeature withGUI "gui")
  
positive.code: { lib
  , stdenv
  , fetchFromGitLab
  , pkg-config
  , autoreconfHook
  , rake
  
negative.code: in
  stdenv.mkDerivation rec {
    pname = "mkvtoolnix";
    version = "71.1.0";
  
    src = fetchFromGitLab {
      owner = "mbunkus";
      repo = "mkvtoolnix";
      rev = "release-${version}";
      sha256 = "sha256-JHbnjcXOctB6HQeHXykWbykdn35S2fCYegMkc3GLmAI=";
    };
  
    nativeBuildInputs = [
  