diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index f43da1168..9eeb0977a 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.19.3-1"
-export PIKA_PACKAGE_NAME="simplejson"
+export PIKA_PACKAGE_VERSION="2.66-1"
+export PIKA_PACKAGE_NAME="gwyddion"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b3"