diff --git a/.versions/krops.nix b/.versions/krops.nix
deleted file mode 100644
index da8291c..0000000
--- a/.versions/krops.nix
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "url": "https://cgit.krebsco.de/krops",
-  "rev": "55aa2c77ce8183f3d2b24f54efa33ab6a42e1e02",
-  "date": "2020-04-19T01:06:20+02:00",
-  "sha256": "00rvx9h596ync8wgic6xc9srzajzm28wlp9q7mv4z0jsb27l5bj8",
-  "fetchSubmodules": false
-}
diff --git a/.versions/nixpkgs-unstable.json b/.versions/nixpkgs-unstable.json
index 715e4b2..99ebab7 100644
--- a/.versions/nixpkgs-unstable.json
+++ b/.versions/nixpkgs-unstable.json
@@ -1,7 +1,7 @@
 {
   "url": "https://github.com/NixOS/nixpkgs-channels.git",
-  "rev": "1179840f9a88b8a548f4b11d1a03aa25a790c379",
-  "date": "2020-09-19T20:38:05-07:00",
-  "sha256": "00jy37wj04bvh299xgal2iik2my9l0nq6cw50r1b2kdfrji8d563",
+  "rev": "84d74ae9c9cbed73274b8e4e00be14688ffc93fe",
+  "date": "2020-09-26T18:54:09-07:00",
+  "sha256": "0ww70kl08rpcsxb9xdx8m48vz41dpss4hh3vvsmswll35l158x0v",
   "fetchSubmodules": false
 }
diff --git a/.versions/nixpkgs.json b/.versions/nixpkgs.json
index 2f89c0a..89614f4 100644
--- a/.versions/nixpkgs.json
+++ b/.versions/nixpkgs.json
@@ -1,7 +1,7 @@
 {
   "url": "https://github.com/NixOS/nixpkgs-channels.git",
-  "rev": "0bc6da3ab075f3ca35b83b6a2069a389bd769c1e",
-  "date": "2020-09-23T09:04:28-04:00",
-  "sha256": "0sfqzlyidjsjzysn48f3h2ysnhqb9gmswjbl85r8md2hs585kyzz",
+  "rev": "b4db68ff563895eea6aab4ff24fa04ef403dfe14",
+  "date": "2020-09-30T16:23:41+02:00",
+  "sha256": "1qbs7p0mmcmpg70ibd437hl57byqx5q0pc61p1dckrkazj7kq0pc",
   "fetchSubmodules": false
 }
diff --git a/.versions/stockholm.json b/.versions/stockholm.json
index f41b9e9..1b69a76 100644
--- a/.versions/stockholm.json
+++ b/.versions/stockholm.json
@@ -1,7 +1,7 @@
 {
   "url": "https://cgit.krebsco.de/stockholm",
-  "rev": "2299f49864cd60b6eebca31eae727d3b0845916f",
-  "date": "2020-09-15T22:57:16+02:00",
-  "sha256": "0zwkjbpqpakvajyc70r6nma5nwdxkqqrxawn29yq92h39zls2kc4",
+  "rev": "132549cded87755018df77b9c18e68d083cee4ca",
+  "date": "2020-10-03T14:12:04+02:00",
+  "sha256": "0s1qkhmk2da579kvb8mi5bhbpp95p0x0cm2245h400cfbvg6rg5s",
   "fetchSubmodules": false
 }
diff --git a/shell.nix b/shell.nix
index 06e47ef..7b1185a 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,5 +1,5 @@
 { pkgs ? import <nixpkgs> { }
-, release ? pkgs.lib.versions.majorMinor pkgs.lib.version
+, release ? "20.03"
 }:
 let
   inherit (pkgs) lib;
@@ -23,7 +23,7 @@ let
     krops = {
       ref = "refs/tags/v1.21.0";
       url = "https://cgit.krebsco.de/krops";
-      path = toString .versions/krops.nix;
+      path = toString .versions/krops.json;
     };
     stockholm = {
       ref = "refs/heads/master";
diff --git a/submodules/much b/submodules/much
index 3700799..69415cb 160000
--- a/submodules/much
+++ b/submodules/much
@@ -1 +1 @@
-Subproject commit 3700799ce49ee5bfd191e7d8e35843aaff5bd3e7
+Subproject commit 69415cb0610deb3608307fe0e3bf0c7022134997