diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 784dfb9b3..913b9b630 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.42.0-4"
-export PIKA_PACKAGE_NAME="python-libtmux"
+export PIKA_PACKAGE_VERSION="1.15.0-3"
+export PIKA_PACKAGE_NAME="mypy"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"