diff --git a/src/cli/parse-flags.ts b/src/cli/parse-flags.ts
index fc73a8590e1..43f11271a2d 100644
--- a/src/cli/parse-flags.ts
+++ b/src/cli/parse-flags.ts
@@ -171,11 +171,10 @@ const ARG_OPTS = {
     'docs',
     'e2e',
     'es5',
+    'esm',
     'headless',
     'help',
     'log',
-    'next',
-    'legacy',
     'open',
     'prerender',
     'prerender-external',