diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index f73bf23c4..16d3779a7 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.21.6-3"
-export PIKA_PACKAGE_NAME="petsc4py"
+export PIKA_PACKAGE_VERSION="0.9.1-2"
+export PIKA_PACKAGE_NAME="rust-pep508-rs"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"