anchor.diff:  
   { stdenv
   , fetchurl
  +, fetchpatch
   , substituteAll
   , gtk-doc
   , pkgconfig
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "fwupd";
    version = "1.3.7";
  
    src = fetchurl {
      url = "https://people.freedesktop.org/~hughsient/releases/fwupd-${version}.tar.xz";
      sha256 = "02mzn3whk5mba4nxyrkypawr1gzjx79n4nrkhrp8vja6mxxgsf10";
    };
  
    # libfwupd goes to lib
  
negative.code:       # needs a different set of modules than po/make-images
        inherit installedTestsPython;
      })
  
      # Find the correct lds and crt name when specifying -Defi_ldsdir
      (fetchpatch {
        url = "https://github.com/fwupd/fwupd/commit/52cda3db9ca9ab4faf99310edf29df926a713b5c.patch";
        sha256 = "0hsj79dzamys7ryz33iwxwd58kb1h7gaw637whm0nkvzkqq6rm16";
      })
    ];
  
    postPatch = ''
  