diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 3feb5a2b3..96748fba4 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.15.0+dfsg-1"
-export PIKA_PACKAGE_NAME="python-memray"
+export PIKA_PACKAGE_VERSION="4.17.1+ds-2"
+export PIKA_PACKAGE_NAME="gtk4"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"