diff --git a/src/lib.rs b/src/lib.rs
index 9f11cb0f..3afe90c4 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 {