From b5cac00ffce11138f81e05ab122d21b234654e69 Mon Sep 17 00:00:00 2001
From: Casey Rodarmor <casey@rodarmor.com>
Date: Thu, 6 Oct 2016 16:56:21 -0700
Subject: [PATCH] Invoke sh with `-u` (error on unbound variable)

---
 src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 9f11cb0..3afe90c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -87,7 +87,7 @@ impl<'a> Recipe<'a> {
         command = &command[1..]; 
       }
       let status = process::Command::new("sh")
-        .arg("-c")
+        .arg("-cu")
         .arg(command)
         .status();
       try!(match status {