diff --git a/krebs/kops.nix b/krebs/kops.nix
index 9774b5cab..caf437b67 100644
--- a/krebs/kops.nix
+++ b/krebs/kops.nix
@@ -13,7 +13,7 @@
 
   krebs-source = {
     nixpkgs.git = {
-      ref = "09bca91e3b5a18d7f37f7632175ac71f2bf369ff";
+      ref = "4b4bbce199d3b3a8001ee93495604289b01aaad3";
       url = https://github.com/NixOS/nixpkgs;
     };
     stockholm.file = toString ~/stockholm;
diff --git a/krebs/source.nix b/krebs/source.nix
index 1f83d29f7..3ee12b37f 100644
--- a/krebs/source.nix
+++ b/krebs/source.nix
@@ -22,10 +22,7 @@ in
       };
       stockholm.file = toString <stockholm>;
       stockholm-version.pipe = "${pkgs.stockholm}/bin/get-version";
-      nixpkgs.git = {
-        url = https://github.com/NixOS/nixpkgs;
-        ref = "09bca91e3b5a18d7f37f7632175ac71f2bf369ff"; # nixos-18.03 # 2018-04-02
-      };
+      nixpkgs = (import ./kops.nix { name = ""; }).krebs-source.nixpkgs;
     }
     override
   ]