diff --git a/pkgs/misc/screensavers/light-locker/default.nix b/pkgs/misc/screensavers/light-locker/default.nix
index dc3f87b1f2be..0b840448f2c0 100644
--- a/pkgs/misc/screensavers/light-locker/default.nix
+++ b/pkgs/misc/screensavers/light-locker/default.nix
@@ -60,6 +60,10 @@ stdenv.mkDerivation rec {
     "-Dgsettings=true"
   ];
 
+  postInstall = ''
+    ${glib.dev}/bin/glib-compile-schemas $out/share/glib-2.0/schemas
+  '';
+
   meta = with stdenv.lib; {
     homepage = https://github.com/the-cavalry/light-locker;
     description = "A simple session-locker for LightDM";