diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index baca927af..9e01fe6c9 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.6.1-2.1"
-export PIKA_PACKAGE_NAME="jam"
+export PIKA_PACKAGE_VERSION="0.1+dfsg.1-6"
+export PIKA_PACKAGE_NAME="concavity"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"