anchor.diff: -{ lib, stdenv
  +{ lib
  +, stdenv
   , fetchurl
   , meson
   , ninja
  
positive.code: , hicolor-icon-theme
  , at-spi2-atk
  , at-spi2-core
  }:
  
  stdenv.mkDerivation rec {
    pname = "libhandy";
    version = "1.2.0";
  
    outputs = [ "out" "dev" "devdoc" "glade" ];
    outputBin = "dev";
  
    src = fetchurl {
      url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
      sha256 = "sha256-OfWQriCRDnb+HAYHsuvliXUPRWENau7Fww4u5gKiCyU=";
    };
  
    nativeBuildInputs = [
      docbook_xml_dtd_43
      docbook_xsl
      gobject-introspection
      gtk-doc
      libxml2
  
negative.code: , gobject-introspection
  , vala
  , gtk-doc
  , docbook-xsl-nons
  , docbook_xml_dtd_43
  , gtk3
  , glade
  