diff --git a/nixos/flake.lock b/nixos/flake.lock
index 7b47bae..8f38f2c 100644
--- a/nixos/flake.lock
+++ b/nixos/flake.lock
@@ -1,26 +1,11 @@
 {
   "nodes": {
-    "backup-module": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1580601325,
-        "narHash": "sha256-eCf6jDYKdW74j/bu3Ni1WtkqYT8t0vrQA84l5icGXNc=",
-        "ref": "master",
-        "rev": "0597529c20f04f57a6d031f7439560e87923f4ce",
-        "revCount": 24,
-        "type": "git",
-        "url": "https://git.ingolf-wagner.de/nix-modules/backup.git"
-      },
-      "original": {
-        "type": "git",
-        "url": "https://git.ingolf-wagner.de/nix-modules/backup.git"
-      }
-    },
     "cluster-module": {
       "flake": false,
       "locked": {
         "lastModified": 1537379100,
         "narHash": "sha256-TcZfK3thYq65S7mHC0jyc2ELVq8Ue8Enuj4iU4L9fTI=",
+        "ref": "master",
         "rev": "ef621797a30f8a57de16bf33672abdd411cbcece",
         "revCount": 8,
         "type": "git",
@@ -307,22 +292,6 @@
         "type": "github"
       }
     },
-    "krops-lib": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1568329403,
-        "narHash": "sha256-G5pdPNaXg9Hv9BX/E24udoRiFcSbjSGJwl3gB+p56j4=",
-        "ref": "master",
-        "rev": "c9adb18bcb0555573232c6a45be6800fc1350e9b",
-        "revCount": 14,
-        "type": "git",
-        "url": "https://git.ingolf-wagner.de/nix-modules/krops.git"
-      },
-      "original": {
-        "type": "git",
-        "url": "https://git.ingolf-wagner.de/nix-modules/krops.git"
-      }
-    },
     "naersk": {
       "inputs": {
         "nixpkgs": [
@@ -363,11 +332,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1635070614,
-        "narHash": "sha256-eRup9WsvSIhsRrSlNugPcQ7gfGOsbk3d4izufwVlz1Q=",
+        "lastModified": 1635719588,
+        "narHash": "sha256-pWjdy0NheM97NsPE6+jUnr5LYyeA0sBGTdw4mfXMGZQ=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "3b1789322fcbcb5cf51228d732752714f1bf77da",
+        "rev": "f0869b1a2c0b150aac26e10bb5c2364ffb2e804f",
         "type": "github"
       },
       "original": {
@@ -402,11 +371,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1634782485,
-        "narHash": "sha256-psfh4OQSokGXG0lpq3zKFbhOo3QfoeudRcaUnwMRkQo=",
+        "lastModified": 1635702959,
+        "narHash": "sha256-ZKxX9DjJJGJqq20pE4dIj1G4ssCLVXXRFerM6lNuF0k=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "34ad3ffe08adfca17fcb4e4a47bb5f3b113687be",
+        "rev": "e544ee88fa4590df75e221e645a03fe157a99e5b",
         "type": "github"
       },
       "original": {
@@ -579,12 +548,10 @@
     },
     "root": {
       "inputs": {
-        "backup-module": "backup-module",
         "cluster-module": "cluster-module",
         "doom-emacs-nix": "doom-emacs-nix",
         "home-manager": "home-manager",
         "home-manager-utils": "home-manager-utils",
-        "krops-lib": "krops-lib",
         "nixpkgs": "nixpkgs",
         "nixpkgs-fmt": "nixpkgs-fmt",
         "nixpkgs-unstable": "nixpkgs-unstable",