From 4bff5b7f3d2bfd1705a10ee7f85d2494ac7bac9f Mon Sep 17 00:00:00 2001
From: Utku Demir <me@utdemir.com>
Date: Sun, 21 Jun 2020 12:11:56 +1200
Subject: [PATCH] dockerTools: Properly quote a shell variable

---
 pkgs/build-support/docker/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix
index 11d5c2b3642..7ff325382a6 100644
--- a/pkgs/build-support/docker/default.nix
+++ b/pkgs/build-support/docker/default.nix
@@ -333,7 +333,7 @@ rec {
 
       chmod ug+w layer
 
-      if [[ -n $extraCommands ]]; then
+      if [[ -n "$extraCommands" ]]; then
         (cd layer; eval "$extraCommands")
       fi