diff --git a/examples/coap/laze.yml b/examples/coap/laze.yml
index 819ba177..45341f12 100644
--- a/examples/coap/laze.yml
+++ b/examples/coap/laze.yml
@@ -8,3 +8,5 @@ apps:
       - ?release
       - network
       - random
+    conflicts:
+      - thumbv6m-none-eabi # try_lock atomic build failure