diff --git a/pkgs/development/libraries/libical/default.nix b/pkgs/development/libraries/libical/default.nix
index 51e2ff52ff6e..fa396e966506 100644
--- a/pkgs/development/libraries/libical/default.nix
+++ b/pkgs/development/libraries/libical/default.nix
@@ -67,7 +67,7 @@ stdenv.mkDerivation rec {
     "-DGOBJECT_INTROSPECTION=True"
     "-DICAL_GLIB_VAPI=True"
   ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
-    "-DIMPORT_GLIB_SRC_GENERATOR=${lib.getDev buildPackages.libical}/lib/cmake/LibIcal/GlibSrcGenerator.cmake"
+    "-DIMPORT_ICAL_GLIB_SRC_GENERATOR=${lib.getDev buildPackages.libical}/lib/cmake/LibIcal/IcalGlibSrcGenerator.cmake"
   ];
 
   patches = [