anchor.diff: -{ stdenv, fetchurl, meson, ninja, pkgconfig, gnome3, gtk3, wrapGAppsHook
  -, glib, amtk, appstream-glib, gobject-introspection, python3
  -, webkitgtk, gettext, itstool, gsettings-desktop-schemas }:
  +{ stdenv
  +, fetchurl
  +, meson
  +, ninja
  +, pkgconfig
  +, gnome3
  +, gtk3
  +, wrapGAppsHook
  +, glib
  +, amtk
  +, appstream-glib
  +, gobject-introspection
  +, python3
  +, webkitgtk
  +, gettext
  +, itstool
  +, gsettings-desktop-schemas
  +}:
   
   stdenv.mkDerivation rec {
     pname = "devhelp";
  
positive.code: 
    meta = with stdenv.lib; {
      description = "API documentation browser for GNOME";
      homepage = https://wiki.gnome.org/Apps/Devhelp;
      license = licenses.gpl2;
      maintainers = gnome3.maintainers;
      platforms = platforms.linux;
    };
  
negative.code:     sha256 = "0zpmn6fgkgiayvn4diia5df0s6s7dqrdnp3nrvpavsmgn0vhb4pg";
    };
  
    nativeBuildInputs = [
      meson
      ninja
      pkgconfig
      gettext
      itstool
      wrapGAppsHook
      appstream-glib
      gobject-introspection
      python3
    ];
  
    buildInputs = [
      glib
      gtk3
      webkitgtk
      amtk
      gnome3.adwaita-icon-theme
      gsettings-desktop-schemas
    ];
  
    doCheck = true;
  