diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 090f37e8a..e5cbdf64e 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1:1.36.0-2.1"
-export PIKA_PACKAGE_NAME="ldc"
+export PIKA_PACKAGE_VERSION="0.16.1-1"
+export PIKA_PACKAGE_NAME="ocaml-angstrom"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"