diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 46db0347d..11d6d0272 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1:22-282+ds-3"
-export PIKA_PACKAGE_NAME="mcl"
+export PIKA_PACKAGE_VERSION="2:0.1~r495-3"
+export PIKA_PACKAGE_NAME="libmpc"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"