diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 17ab5694f..bf9927954 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2:1.8+git20240714-3"
-export PIKA_PACKAGE_NAME="gnumach"
+export PIKA_PACKAGE_VERSION="4.3.0-1"
+export PIKA_PACKAGE_NAME="python-typeguard"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"