diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 4919c0d4b..c5e8f5a96 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="7.6.0+dfsg1-2"
-export PIKA_PACKAGE_NAME="python-coverage"
+export PIKA_PACKAGE_VERSION="5.13.2-2"
+export PIKA_PACKAGE_NAME="isort"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"