diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 38aada4e1..359c5105b 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.0.0.0-19"
-export PIKA_PACKAGE_NAME="haskell-erf"
+export PIKA_PACKAGE_VERSION="0.8.0-7"
+export PIKA_PACKAGE_NAME="haskell-ieee754"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"