diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a5989cef..26ab0600 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -245,7 +245,7 @@ jobs:
                     if (hm.features && hm.features.includes("keys")) {
                       return hm.requires.flatMap(i => 
                         metadata.interconnects[i].boards.flatMap(b => boardAndShield(b, hm))
-                      );
+                      ) || [];
                     }
                     break;
                   case "interconnect":