anchor.diff:    nativeBuildInputs = [
       meson
       ninja
  -    vala_0_40
  +    vala
       pkg-config
       python3
       wrapGAppsHook
  
positive.code: , libsoup
  , libgee
  , wrapGAppsHook
  , vala_0_40
  }:
  
  stdenv.mkDerivation rec {
  
negative.code: { lib
  , stdenv
  , fetchFromGitHub
  , nix-update-script
  , meson
  