diff --git a/pika-build-config/v3.sh b/pika-build-config/v3.sh
index 3834247a2..9a91832da 100644
--- a/pika-build-config/v3.sh
+++ b/pika-build-config/v3.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="4:24.08.0-4"
-export PIKA_PACKAGE_NAME="dolphin"
+export PIKA_PACKAGE_VERSION="1:19.1.2-1"
+export PIKA_PACKAGE_NAME="llvm-toolchain-19"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b1"