From 0a3abd96a1814aa2e14d079f982b4076d58a47bd Mon Sep 17 00:00:00 2001
From: Jeremie Dimino <jdimino@janestreet.com>
Date: Thu, 8 Jun 2017 11:42:14 +0100
Subject: [PATCH] Fix expansion of ROOT

---
 src/super_context.ml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/super_context.ml b/src/super_context.ml
index f42681a2..fcb3f738 100644
--- a/src/super_context.ml
+++ b/src/super_context.ml
@@ -586,7 +586,7 @@ module Action = struct
           end
         | _ ->
           match var with
-          | "ROOT" -> Some (path_exp Path.root)
+          | "ROOT" -> Some (path_exp sctx.context.build_dir)
           | "@" -> begin
               match targets_written_by_user with
               | Infer -> Loc.fail loc "You cannot use ${@} with inferred rules."