anchor.diff:  , fetchurl
   , pkg-config
   , libxml2
  -, gtk3
  +, gtk4
   , glib
  -, gtksourceview4
  +, gtksourceview5
   , wrapGAppsHook
   , gobject-introspection
   , python3
  
positive.code:   ];
  
    buildInputs = [
      gtk3
      glib
      libxml2
      gtksourceview4
      mpfr
      gmp
      gnome.adwaita-icon-theme
      libgee
      gsettings-desktop-schemas
      libsoup
      libmpc
      libhandy
    ];
  
    doCheck = true;
  
negative.code: , gmp
  , libsoup
  , libmpc
  , libadwaita
  , gsettings-desktop-schemas
  , libgee
  }:
  
  stdenv.mkDerivation rec {
    pname = "gnome-calculator";
    version = "42.beta";
  
    src = fetchurl {
      url = "mirror://gnome/sources/gnome-calculator/${lib.versions.major version}/${pname}-${version}.tar.xz";
      sha256 = "9nruUc/Ql9pdJ7uU/o0JCkpopfd90boL5fN4X6KFKu0=";
    };
  
    nativeBuildInputs = [
  