diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index e18239ca1..7e0863248 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.21.2+dfsg1-1"
-export PIKA_PACKAGE_NAME="slepc"
+export PIKA_PACKAGE_VERSION="0.6.5.0-3"
+export PIKA_PACKAGE_NAME="haskell-quickcheck-classes"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"