Getting close.

Author: davidmorgan

build_runner_core/lib/src/generate/build.dart

@@ -1035,6 +1035,7 @@ class Build {
       'Do not build ${renderer.build(forInput, outputs)} because '
       'there is no reason to build it.',
     );
+    builtAssets.addAll(outputs);
 
     return false;
   }