anchor.diff: -{ stdenv, fetchurl, pkgconfig, meson, ninja, valadoc
  +{ stdenv, fetchurl, pkgconfig, meson, ninja, makeFontsConf
   , gnome3, glib, json-glib, libarchive, libsoup, gobjectIntrospection }:
   
   let
  
positive.code:   doCheck = true;
  
    checkPhase = "(cd test && ./httpseverywhere_test)";
  
    outputs = [ "out" "devdoc" ];
  
  
negative.code:     sha256 = "0vcnimlfcscyvjbh845xbnjb9qc8x0mliaqz2gczxxpakxrbl3gh";
    };
  
    nativeBuildInputs = [ gnome3.vala gobjectIntrospection meson ninja pkgconfig ];
    buildInputs = [ glib gnome3.libgee json-glib libsoup libarchive ];
  
    mesonFlags = [ "-Denable_valadoc=true" ];
  