diff --git a/krebs/source.nix b/krebs/source.nix
index 0bd797a16..e5fb6c5e1 100644
--- a/krebs/source.nix
+++ b/krebs/source.nix
@@ -24,7 +24,7 @@ in
       stockholm-version.pipe = "${pkgs.stockholm}/bin/get-version";
       nixpkgs.git = {
         url = https://github.com/NixOS/nixpkgs;
-        ref = "48856a91c02b456c80c37c863d8610090b38707a"; # nixos-18.03 # 2018-03-24
+        ref = "b6ddb9913f2b8206837e0f137db907bdefb9275e"; # nixos-18.03 # 2018-03-24
       };
     }
     override