diff --git a/pika-build-config/amd64.sh b/pika-build-config/amd64.sh
index 5ec5e0a30..06970f852 100644
--- a/pika-build-config/amd64.sh
+++ b/pika-build-config/amd64.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.3.0-1"
-export PIKA_PACKAGE_NAME="ocaml-multicore-magic"
+export PIKA_PACKAGE_VERSION="1.3.0-1"
+export PIKA_PACKAGE_NAME="jp2a"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b2"