diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 82b4d8aab..fbb3338b5 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.1.1-1"
-export PIKA_PACKAGE_NAME="rust-core-maths"
+export PIKA_PACKAGE_VERSION="7.3.18+dfsg-1"
+export PIKA_PACKAGE_NAME="pypy3"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"