diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index e494c9e32..b6296b4c5 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.5-3"
-export PIKA_PACKAGE_NAME="gtkhash"
+export PIKA_PACKAGE_VERSION="0.64"
+export PIKA_PACKAGE_NAME="isenkram"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"