diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 4d3b9ebd7..9c5af0e4c 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.20.5-4"
-export PIKA_PACKAGE_NAME="petsc4py"
+export PIKA_PACKAGE_VERSION="1.5.0-2"
+export PIKA_PACKAGE_NAME="rust-proptest"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"