nemo-seahorse: Remove update script & cmake, simplify

--- a/data/meson.build

+++ b/data/meson.build

@@ -1,10 +1,13 @@

 dataconf = configuration_data()

 dataconf.set('VERSION', meson.project_version())

+schemadir = get_option('prefix') / get_option('datadir') / 'glib-2.0' / 'schemas'

+

 install_data(

     'org.nemo.plugins.seahorse.gschema.xml',

     'org.nemo.plugins.seahorse.window.gschema.xml',

     install_dir: get_option('datadir') / 'glib-2.0' / 'schemas',

 )

+meson.add_install_script('glib-compile-schemas', schemadir)

 install_man('nemo-seahorse-tool.1')

  glib,

  gtk3,

  nemo,

  cmake,

  dbus-glib,

  libcryptui,

  gcr,

  libnotify,

  gnupg,

  gpgme,

  nix-update-script,

}:

stdenv.mkDerivation rec {

  sourceRoot = "${src.name}/nemo-seahorse";

  patches = [ ./fix-schemas.patch ];

  nativeBuildInputs = [

    glib

    meson

    pkg-config

    ninja

    cmake

  ];

  buildInputs = [

    gnupg

  ];

  PKG_CONFIG_LIBNEMO_EXTENSION_EXTENSIONDIR = "${placeholder "out"}/${nemo.extensiondir}";

  postInstall = ''

    glib-compile-schemas $out/share/glib-2.0/schemas

  '';

  passthru.updateScript = nix-update-script { };

  env.PKG_CONFIG_LIBNEMO_EXTENSION_EXTENSIONDIR = "${placeholder "out"}/${nemo.extensiondir}";

  meta = {

    homepage = "https://github.com/linuxmint/nemo-extensions/tree/master/nemo-seahorse";