diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 9053066a6..aa9be9491 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.3.2.20-1"
-export PIKA_PACKAGE_NAME="haskell-email-validate"
+export PIKA_PACKAGE_VERSION="2.12-2"
+export PIKA_PACKAGE_NAME="haskell-irc-core"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"