diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 0be40916e..734a4c5d0 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.3.0-3"
-export PIKA_PACKAGE_NAME="ruby-peek-pg"
+export PIKA_PACKAGE_VERSION="1.5.8-1"
+export PIKA_PACKAGE_NAME="ruby-pkg-config"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"