diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index d0b882436..7b0b08657 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.1.3-7"
-export PIKA_PACKAGE_NAME="haskell-word8"
+export PIKA_PACKAGE_VERSION="19.0.0~rc1-2"
+export PIKA_PACKAGE_NAME="networking-sfc"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"