diff --git a/engine/src/flutter/sky/tools/sky_snapshot/vm.cc b/engine/src/flutter/sky/tools/sky_snapshot/vm.cc
index e13246adf9..eb5f8b941f 100644
--- a/engine/src/flutter/sky/tools/sky_snapshot/vm.cc
+++ b/engine/src/flutter/sky/tools/sky_snapshot/vm.cc
@@ -16,6 +16,7 @@ extern void* kDartIsolateSnapshotBuffer;
 static const char* kDartArgs[] = {
     "--enable_mirrors=false",
     "--load_deferred_eagerly=true",
+    "--conditional_directives",
 };
 
 void InitDartVM() {