diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 89ef73148..5ff0c5764 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="9.6.6.20240701-1"
-export PIKA_PACKAGE_NAME="haskell-ghc-lib-parser"
+export PIKA_PACKAGE_VERSION="0.1.1.0-1"
+export PIKA_PACKAGE_NAME="haskell-commutative-semigroups"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"