From eef076620957a4dc9f93227cd1ef8686f63d572a Mon Sep 17 00:00:00 2001
From: Noah <noah.bogart@hey.com>
Date: Wed, 26 May 2021 19:08:05 -0400
Subject: [PATCH] Add `$` to parameter grammar (#838)

---
 GRAMMAR.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/GRAMMAR.md b/GRAMMAR.md
index 8480d513c5..ee1f4d462e 100644
--- a/GRAMMAR.md
+++ b/GRAMMAR.md
@@ -90,7 +90,7 @@ sequence      : expression ',' sequence
 recipe        : '@'? NAME parameter* variadic? ':' dependency* body?
 
 parameter     : NAME
-              | NAME '=' value
+              | '$'? NAME '=' value
 
 variadic      : '*' parameter
               | '+' parameter