diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index c739a1c7b..ac37ad8ce 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.83.0-4.1"
-export PIKA_PACKAGE_NAME="boost1.83"
+export PIKA_PACKAGE_VERSION="4.20.0-2"
+export PIKA_PACKAGE_NAME="libtasn1-6"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"