diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index ba3c5aaee..37b6c4e1c 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.73"
-export PIKA_PACKAGE_NAME="mailcap"
+export PIKA_PACKAGE_VERSION="2.7.4+git6-g9134ad92-9"
+export PIKA_PACKAGE_NAME="python-whoosh"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"