diff --git a/flake.lock b/flake.lock
index 5c2cd2c..5259f89 100644
--- a/flake.lock
+++ b/flake.lock
@@ -71,11 +71,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1654750003,
-        "narHash": "sha256-rPvrKSBXt25u2KahbUZwX8ygxhxSIiDsf3Esm35pEjU=",
+        "lastModified": 1654775525,
+        "narHash": "sha256-V1gRf9hCZsSRImC3z0SqHg93m7tIdWjONSIxPh8/6wE=",
         "owner": "nix-community",
         "repo": "emacs-overlay",
-        "rev": "7ea96f12648f59c2a46b42ad18195ba11095d6f0",
+        "rev": "17c4af8fcb6200c894fb1351a423676ba34f7f01",
         "type": "github"
       },
       "original": {
@@ -366,21 +366,6 @@
         "type": "github"
       }
     },
-    "nixpkgs_3": {
-      "locked": {
-        "lastModified": 1626852498,
-        "narHash": "sha256-lOXUJvi0FJUXHTVSiC5qsMRtEUgqM4mGZpMESLuGhmo=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "16105403bdd843540cbef9c63fc0f16c1c6eaa70",
-        "type": "github"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "ref": "nixos-unstable",
-        "type": "indirect"
-      }
-    },
     "root": {
       "inputs": {
         "comma": "comma",
@@ -398,7 +383,9 @@
     "simple-nixos-mailserver": {
       "inputs": {
         "blobs": "blobs",
-        "nixpkgs": "nixpkgs_3",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
         "nixpkgs-21_05": "nixpkgs-21_05",
         "nixpkgs-21_11": "nixpkgs-21_11",
         "utils": "utils"