diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 54e87a40c..90641170d 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.6.46-3"
-export PIKA_PACKAGE_NAME="libpng1.6"
+export PIKA_PACKAGE_VERSION="0.5.1-3.1"
+export PIKA_PACKAGE_NAME="pycirkuit"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"