Set defaults properly

.gitlab-ci.yml

@@ -3,9 +3,12 @@ spec:
     os:
     platform:
     tagname:
-    cross_platform: 'no'
-    build_flags: 'RELEASE=1'
-    no_javascript: 'no'
+    cross_platform:
+      default: 'no'
+    build_flags:
+      default: 'RELEASE=1'
+    no_javascript:
+      default: 'no'
 ---
 .rules:
   rules: