diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 0c4299a14..d2f644f02 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.3.4+dfsg-1"
-export PIKA_PACKAGE_NAME="r-cran-qpdf"
+export PIKA_PACKAGE_VERSION="4.2-1"
+export PIKA_PACKAGE_NAME="haskell-copilot-interpreter"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"