anchor.diff:         OpenCycleMap, OpenAerialMap, and Maps for free.
       '';
   
  -     maintainers = teams.gnome.members;
  -     platforms = platforms.gnu ++ platforms.linux;  # arbitrary choice
  +    maintainers = teams.gnome.members;
  +    platforms = platforms.gnu ++ platforms.linux; # arbitrary choice
     };
   }
  
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: { 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";
  