diff --git a/flake.lock b/flake.lock
index 3305ce1..5413db9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,37 @@
 {
   "nodes": {
+    "blobs": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1604995301,
+        "narHash": "sha256-wcLzgLec6SGJA8fx1OEN1yV/Py5b+U5iyYpksUY/yLw=",
+        "owner": "simple-nixos-mailserver",
+        "repo": "blobs",
+        "rev": "2cccdf1ca48316f2cfd1c9a0017e8de5a7156265",
+        "type": "gitlab"
+      },
+      "original": {
+        "owner": "simple-nixos-mailserver",
+        "repo": "blobs",
+        "type": "gitlab"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1724316499,
@@ -16,9 +48,96 @@
         "type": "github"
       }
     },
+    "nixpkgs-24_05": {
+      "locked": {
+        "lastModified": 1717144377,
+        "narHash": "sha256-F/TKWETwB5RaR8owkPPi+SPJh83AQsm6KrQAlJ8v/uA=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "805a384895c696f802a9bf5bf4720f37385df547",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-24.05",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1717602782,
+        "narHash": "sha256-pL9jeus5QpX5R+9rsp3hhZ+uplVHscNJh8n8VpqscM0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e8057b67ebf307f01bdcc8fba94d94f75039d1f6",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
     "root": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "simple-nixos-mailserver": "simple-nixos-mailserver"
+      }
+    },
+    "simple-nixos-mailserver": {
+      "inputs": {
+        "blobs": "blobs",
+        "flake-compat": "flake-compat",
+        "nixpkgs": "nixpkgs_2",
+        "nixpkgs-24_05": "nixpkgs-24_05",
+        "utils": "utils"
+      },
+      "locked": {
+        "lastModified": 1718084203,
+        "narHash": "sha256-Cx1xoVfSMv1XDLgKg08CUd1EoTYWB45VmB9XIQzhmzI=",
+        "owner": "simple-nixos-mailserver",
+        "repo": "nixos-mailserver",
+        "rev": "29916981e7b3b5782dc5085ad18490113f8ff63b",
+        "type": "gitlab"
+      },
+      "original": {
+        "owner": "simple-nixos-mailserver",
+        "ref": "nixos-24.05",
+        "repo": "nixos-mailserver",
+        "type": "gitlab"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1709126324,
+        "narHash": "sha256-q6EQdSeUZOG26WelxqkmR7kArjgWCdw5sfJVHPH/7j8=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "d465f4819400de7c8d874d50b982301f28a84605",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index 7bbadba..6069e04 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,13 +3,15 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
+    simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-24.05";
   };
 
-  outputs = { self, nixpkgs, ... }: {
+  outputs = { nixpkgs, simple-nixos-mailserver, ... }: {
     nixosConfigurations.quasar = nixpkgs.lib.nixosSystem {
       system = "x86_64-linux";
       modules = [
         ./configuration.nix
+        simple-nixos-mailserver.nixosModule
       ];
     };
   };