diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 2fc936e17..c81f88b83 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1:4.17.2-3"
-export PIKA_PACKAGE_NAME="shadow"
+export PIKA_PACKAGE_VERSION="3.0.10+really3.0.10-4"
+export PIKA_PACKAGE_NAME="guile-3.0"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"