anchor.diff: -{ fetchurl, lib, stdenv, meson, ninja, vala, gtk-doc, docbook_xsl, docbook_xml_dtd_412, pkg-config, glib, gtk3, cairo, sqlite, gnome
  -, clutter-gtk, libsoup, gobject-introspection /*, libmemphis */ }:
  +{ fetchurl
  +, lib
  +, stdenv
  +, meson
  +, ninja
  +, vala
  +, gtk-doc
  +, docbook_xsl
  +, docbook_xml_dtd_412
  +, pkg-config
  +, glib
  +, gtk3
  +, cairo
  +, sqlite
  +, gnome
  +, clutter-gtk
  +, libsoup
  +, gobject-introspection /*, libmemphis */
  +}:
   
   stdenv.mkDerivation rec {
     pname = "libchamplain";
  
positive.code: 
    outputs = [ "out" "dev" "devdoc" ];
  
    nativeBuildInputs = [ meson ninja pkg-config gobject-introspection vala gtk-doc docbook_xsl docbook_xml_dtd_412 ];
  
    buildInputs = [ sqlite libsoup ];
  
    propagatedBuildInputs = [ glib gtk3 cairo clutter-gtk ];
  
    mesonFlags = [
      "-Dgtk_doc=true"
  
negative.code:        OpenCycleMap, OpenAerialMap, and Maps for free.
      '';
  
      maintainers = teams.gnome.members;
      platforms = platforms.gnu ++ platforms.linux; # arbitrary choice
    };
  }
  