diff --git a/pika-build-config/v3.sh b/pika-build-config/v3.sh
index 4b3e2f666..4d543d289 100644
--- a/pika-build-config/v3.sh
+++ b/pika-build-config/v3.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="4.0.5.3140.ds6-15"
-export PIKA_PACKAGE_NAME="firebird4.0"
+export PIKA_PACKAGE_VERSION="1:20.1.0~+rc1-1~exp1"
+export PIKA_PACKAGE_NAME="llvm-toolchain-20"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b1"