Swap header/src into the right order
diff --git a/build.yaml b/build.yaml
index f5dc786..9a829f2 100644
--- a/build.yaml
+++ b/build.yaml
@@ -461,10 +461,10 @@
 - name: grpc_lb_policy_grpclb
   headers:
   - src/core/ext/lb_policy/grpclb/load_balancer_api.h
-  - src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.c
+  - src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.h
   src:
   - src/core/ext/lb_policy/grpclb/load_balancer_api.c
-  - src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.h
+  - src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.c
   uses:
   - grpc_base
 - name: grpc_lb_policy_pick_first