anchor.diff:    pname = "folks";
     version = "0.13.2";
   
  -  outputs = [ "out" "dev" ];
  +  outputs = [ "out" "dev" "devdoc" ];
   
     src = fetchurl {
       url = "mirror://gnome/sources/${pname}/${stdenv.lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  
positive.code:   };
  
    mesonFlags = [
      # TODO: https://gitlab.gnome.org/GNOME/folks/issues/108
      "-Ddocs=false"
    ];
  
    nativeBuildInputs = [
      gettext
      gobject-introspection
      gtk3
      meson
      ninja
      pkgconfig
  
negative.code: , python3
  , readline
  , gtk3
  , gtk-doc
  , docbook-xsl-nons
  , docbook_xml_dtd_43
  }:
  
  # TODO: enable more folks backends
  