diff --git a/.forgejo/workflows/build-rpms.yml b/.forgejo/workflows/build-rpms.yml
index 1570b89..14e4ef3 100644
--- a/.forgejo/workflows/build-rpms.yml
+++ b/.forgejo/workflows/build-rpms.yml
@@ -52,6 +52,7 @@ jobs:
         run: |
           cat > /tmp/mock-custom.cfg <<'MOCKEOF'
           include('/etc/mock/alma+epel-10-x86_64.cfg')
+          config_opts['root'] = 'custom'
           config_opts['yum.conf'] += """
           [sonicde-rpm]
           name=SonicDE RPM