diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index d43a300f8..2c19bb15b 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.6.0-5"
-export PIKA_PACKAGE_NAME="ghub-el"
+export PIKA_PACKAGE_VERSION="1:804.036+dfsg1-3"
+export PIKA_PACKAGE_NAME="perl-tk"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"