diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 76884f1be..85bf1ed91 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.015-1"
-export PIKA_PACKAGE_NAME="libextutils-builder-compiler-perl"
+export PIKA_PACKAGE_VERSION="1:0.3.1-1"
+export PIKA_PACKAGE_NAME="unrar-free"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"