diff --git a/flake.lock b/flake.lock
index 275f1a6..da99e8e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -93,10 +93,7 @@
     },
     "naersk": {
       "inputs": {
-        "nixpkgs": [
-          "comma",
-          "nixpkgs"
-        ]
+        "nixpkgs": "nixpkgs"
       },
       "locked": {
         "lastModified": 1650101877,
@@ -131,18 +128,15 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1652020977,
-        "narHash": "sha256-9hDlNbrxzD/pLlXmoQ6gzxbYiSAKrj7uHYUWNByLFlI=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "3c5ae9be1f18c790ea890ef8decbd0946c0b4c04",
-        "type": "github"
+        "lastModified": 1651662302,
+        "narHash": "sha256-utlTjLa1s4ezdQIUvnBtmA9TBYFrPlXpAJnCXEiZFZI=",
+        "path": "/nix/store/0h8fb4p3gxpqsmw1sxfymvs6rxaask0f-source",
+        "rev": "dff5496b12817e3d019983827c4b7ba7beb96580",
+        "type": "path"
       },
       "original": {
-        "owner": "NixOS",
-        "ref": "nixos-21.11",
-        "repo": "nixpkgs",
-        "type": "github"
+        "id": "nixpkgs",
+        "type": "indirect"
       }
     },
     "nixpkgs-21_05": {
@@ -192,6 +186,22 @@
       }
     },
     "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1652020977,
+        "narHash": "sha256-9hDlNbrxzD/pLlXmoQ6gzxbYiSAKrj7uHYUWNByLFlI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "3c5ae9be1f18c790ea890ef8decbd0946c0b4c04",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-21.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
       "locked": {
         "lastModified": 1626852498,
         "narHash": "sha256-lOXUJvi0FJUXHTVSiC5qsMRtEUgqM4mGZpMESLuGhmo=",
@@ -212,7 +222,7 @@
         "emacs-overlay": "emacs-overlay",
         "home-manager": "home-manager",
         "nixos-hardware": "nixos-hardware",
-        "nixpkgs": "nixpkgs",
+        "nixpkgs": "nixpkgs_2",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "simple-nixos-mailserver": "simple-nixos-mailserver",
         "sops-nix": "sops-nix"
@@ -221,7 +231,7 @@
     "simple-nixos-mailserver": {
       "inputs": {
         "blobs": "blobs",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": "nixpkgs_3",
         "nixpkgs-21_05": "nixpkgs-21_05",
         "nixpkgs-21_11": "nixpkgs-21_11",
         "utils": "utils_2"