diff --git a/pika-build-config/v3.sh b/pika-build-config/v3.sh
index 5e51c7f80..e92f81e91 100644
--- a/pika-build-config/v3.sh
+++ b/pika-build-config/v3.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.0049"
-export PIKA_PACKAGE_NAME="ucf"
+export PIKA_PACKAGE_VERSION="1:18.1.8-16"
+export PIKA_PACKAGE_NAME="llvm-toolchain-18"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b1"