diff --git a/.zuul.d/cross-jobs.yaml b/.zuul.d/cross-jobs.yaml
index 6b4bb77df0..a20c5ed3e0 100644
--- a/.zuul.d/cross-jobs.yaml
+++ b/.zuul.d/cross-jobs.yaml
@@ -16,6 +16,8 @@
     nodeset: ubuntu-bionic
     vars:
       zuul_work_dir: "{{ (zuul.projects.values() | selectattr('required') | selectattr('name', 'match', '^(?!openstack/requirements)') | list)[0].src_dir }}"
+    environment:
+      UPPER_CONSTRAINTS_FILE: "{{ ansible_user_dir }}/{{ zuul.projects['opendev.org/openstack/requirements'].src_dir }}/upper-constraints.txt"
     files:
       - upper-constraints.txt
       - .zuul.d/cross-jobs.yaml