Pass in params by const ref

Signed-off-by: Shea Levy <shea@shealevy.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstore/globals.hh b/src/libstore/globals.hh
index 5e7cfda9a124..13772c65cbac 100644
--- a/src/libstore/globals.hh
+++ b/src/libstore/globals.hh
@@ -25,7 +25,7 @@ struct Settings {
 
     string pack();
 
-    void unpack(string pack);
+    void unpack(const string &pack);
 
     SettingsMap getOverrides();