diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index cbffcbede..070d6aad9 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.5.2-1"
-export PIKA_PACKAGE_NAME="libgraph-nauty-perl"
+export PIKA_PACKAGE_VERSION="2.002-2"
+export PIKA_PACKAGE_NAME="libpdl-perldl2-perl"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"