diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 3422ac42c..44bb930ea 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2024.1.4+ds1-3"
-export PIKA_PACKAGE_NAME="pyvkfft"
+export PIKA_PACKAGE_VERSION="2.9.11~20110321-20"
+export PIKA_PACKAGE_NAME="sl-modem"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"