anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "fwupd";
  -  version = "1.3.7";
  +  version = "1.3.8";
   
     src = fetchurl {
       url = "https://people.freedesktop.org/~hughsient/releases/fwupd-${version}.tar.xz";
  -    sha256 = "02mzn3whk5mba4nxyrkypawr1gzjx79n4nrkhrp8vja6mxxgsf10";
  +    sha256 = "14hbwp3263n4z61ws62vj50kh9a89fz2l29hyv7f1xlas4zz6j8x";
     };
   
     # libfwupd goes to lib
  
positive.code:       # needs a different set of modules than po/make-images
        inherit installedTestsPython;
      })
    ];
  
    postPatch = ''
  
negative.code: 
  { stdenv
  , fetchurl
  , fetchpatch
  , substituteAll
  , gtk-doc
  , pkgconfig
  