anchor.diff:  { stdenv
   , fetchurl
  -, file
   , gettext
  -, intltool
   , lib
  -#, meson
  -#, ninja
  +, meson
  +, ninja
   
   , glib
   , gobject-introspection
  
positive.code: }:
  
  let
    inherit (lib)
      boolEn;
  
    channel = "0.3";
    version = "${channel}.4";
  in
  stdenv.mkDerivation rec {
    name = "grilo-${version}";
  
negative.code: 
    setupHook = ./setup-hook.sh;
  
    mesonFlags = [
      "-Denable-test-ui=false"
      "-Denable-vala=${lib.boolTf (vala != null)}"
    ];
  
    setVapidirInstallFlag = false;
  
    passthru = {
      srcVerification = fetchurl {
  