diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 5f2bef8c1..ab672be68 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.10.2-1"
-export PIKA_PACKAGE_NAME="haskell-tasty-hunit"
+export PIKA_PACKAGE_VERSION="0.3.3-1"
+export PIKA_PACKAGE_NAME="python-proton-core"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"