diff --git a/_versions/nixpkgs-unstable.json b/_versions/nixpkgs-unstable.json
index d364904..f2f4cd5 100644
--- a/_versions/nixpkgs-unstable.json
+++ b/_versions/nixpkgs-unstable.json
@@ -1,7 +1,7 @@
 {
   "url": "https://github.com/NixOS/nixpkgs-channels.git",
-  "rev": "3ccbc8d89153ecf13f3eae7d9c106d91cd4ab9e5",
-  "date": "2019-11-29T18:09:02-05:00",
-  "sha256": "1mgqx1h8i9npxzmywdhkgm67iwsa0rvicwjs5wjssxlzx0hf6z5z",
+  "rev": "bb1013511e1e5edcf314df8321acf2f3c536df0d",
+  "date": "2019-12-01T23:55:47+00:00",
+  "sha256": "0qycfgnf0k2bxk7k88h80l8kyq9232knbn9ybiv3nla69hjlslrk",
   "fetchSubmodules": false
 }
diff --git a/_versions/nixpkgs.json b/_versions/nixpkgs.json
index c4b8cb7..f81d3df 100644
--- a/_versions/nixpkgs.json
+++ b/_versions/nixpkgs.json
@@ -1,7 +1,7 @@
 {
   "url": "https://github.com/NixOS/nixpkgs-channels.git",
-  "rev": "b2448a9fde1225c3681e576ab4d35d68631ca75e",
-  "date": "2019-11-29T14:56:18+01:00",
-  "sha256": "1npciv7vjjxx1hlyxg1pnpi64dvf4amcp3vwwv5cvpzsi0hj3zl7",
+  "rev": "72a2ced252348defc877bea0a8b551272c0be3f9",
+  "date": "2019-12-03T02:09:55+00:00",
+  "sha256": "0vxqx5zsc8blzny89pwmhap4l105ryhpay1xviyxvcn7hx93i39x",
   "fetchSubmodules": false
 }
diff --git a/deploy.nix b/deploy.nix
index 5bb37de..e5fda1b 100644
--- a/deploy.nix
+++ b/deploy.nix
@@ -4,10 +4,7 @@ let
     inherit (object) url;
     ref = object.rev;
   };
-  krops = builtins.fetchGit {
-    url = "https://cgit.krebsco.de/krops/";
-    ref = (importJson _versions/krops.json).rev;
-  };
+  krops = builtins.fetchGit (gitFromJson _versions/krops.json);
   lib = import "${krops}/lib";
   pkgs = import "${krops}/pkgs" {};
   importJson = (import <nixpkgs> {}).lib.importJSON;
diff --git a/niveum-update b/niveum-update
index 93b29eb..2206765 100755
--- a/niveum-update
+++ b/niveum-update
@@ -11,9 +11,9 @@ fetch() {
     > "${output}"
 }
 
-fetch "refs/heads/nixos-19.09" _versions/nixpkgs.json
-fetch "refs/heads/nixos-unstable" _versions/nixpkgs-unstable.json
-
-fetch "refs/heads/release-19.09" _versions/home-manager.json "https://github.com/rycee/home-manager.git"
-fetch "refs/tags/v1.15.0" _versions/krops.json "https://cgit.krebsco.de/krops"
-fetch "ea5b591d065b721666fc3527ad45a7545a594a77" _versions/stockholm.json "https://cgit.krebsco.de/stockholm"
+fetch "refs/heads/nixos-19.09" _versions/nixpkgs.json &
+fetch "refs/heads/nixos-unstable" _versions/nixpkgs-unstable.json &
+fetch "refs/heads/release-19.09" _versions/home-manager.json "https://github.com/rycee/home-manager.git" &
+fetch "refs/tags/v1.15.0" _versions/krops.json "https://cgit.krebsco.de/krops" &
+fetch "ea5b591d065b721666fc3527ad45a7545a594a77" _versions/stockholm.json "https://cgit.krebsco.de/stockholm" &
+wait