diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 68c7809b8..a470f842a 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.23-2"
-export PIKA_PACKAGE_NAME="python-validate-pyproject"
+export PIKA_PACKAGE_VERSION="4.5-3"
+export PIKA_PACKAGE_NAME="proofgeneral"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"