anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "umockdev";
  -  version = "0.15.4";
  +  version = "0.16.3";
   
     outputs = [ "bin" "out" "dev" "devdoc" ];
   
     src = fetchurl {
       url = "https://github.com/martinpitt/umockdev/releases/download/${version}/${pname}-${version}.tar.xz";
  -    sha256 = "09k8jwvsphd97hcagf0zaf0hwzlzq2r8jfgbmvj55k7ylrg8hjxg";
  +    sha256 = "TjHxqtz8mPhzpsMb5lXWdj8hx/whsadTfor4S2x4U2M=";
     };
  -
  -  patches = [
  -    # Fix build with Vala 0.52
  -    (fetchpatch {
  -      url = "https://github.com/martinpitt/umockdev/commit/a236f0b55fbb6ff50a6429da9d404703d6637d94.patch";
  -      sha256 = "sZs9Ove1r7te/a9vmWUmFetLVhyzhHmx7ijhkK/2S5o=";
  -    })
  -  ];
   
     nativeBuildInputs = [
       docbook-xsl-nons
  
positive.code: , lib
  , docbook-xsl-nons
  , fetchurl
  , fetchpatch
  , glib
  , gobject-introspection
  , gtk-doc
  , libgudev
  , meson
  , ninja
  , pkg-config
  
negative.code:     glib
      systemd
      libgudev
      libpcap
    ];
  
    checkInputs = [
  