diff --git a/.zuul.d/cross-jobs.yaml b/.zuul.d/cross-jobs.yaml
index 792dd977e7..50115d4329 100644
--- a/.zuul.d/cross-jobs.yaml
+++ b/.zuul.d/cross-jobs.yaml
@@ -13,7 +13,7 @@
 
          Use the specified tox environments (``ALL`` selects all).
     vars:
-      zuul_work_dir: "{{ (zuul.projects | selectattr('required') | selectattr('name', 'match', '^(?!openstack/requirements)') | list)[0].src_dir }}"
+      zuul_work_dir: "{{ (zuul.projects.values() | selectattr('required') | selectattr('name', 'match', '^(?!openstack/requirements)') | list)[0].src_dir }}"
       # NOTE(jeblair): temporarily disabled tox_siblings until the fix
       # in https://review.openstack.org/514058 lands.
       tox_install_siblings: false