chore: update dependencies and migrate to nixos-25.05

- Updated `nixos-mailserver` to track the nixos-25.05 release.
- Replaced `systems_7` with `systems_6` and updated `flake-utils`.
- Added new dependencies: `git-hooks` and `gitignore_2`.
- Updated `nixpkgs` to a newer revision.

flake.lock

@@ -326,7 +326,7 @@
     },
     "flake-utils_5": {
       "inputs": {
-        "systems": "systems_7"
+        "systems": "systems_6"
       },
       "locked": {
         "lastModified": 1694529238,
@@ -342,6 +342,32 @@
         "type": "github"
       }
     },
+    "git-hooks": {
+      "inputs": {
+        "flake-compat": [
+          "simple-nixos-mailserver",
+          "flake-compat"
+        ],
+        "gitignore": "gitignore_2",
+        "nixpkgs": [
+          "simple-nixos-mailserver",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1747372754,
+        "narHash": "sha256-2Y53NGIX2vxfie1rOW0Qb86vjRZ7ngizoo+bnXU9D9k=",
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "rev": "80479b6ec16fefd9c1db3ea13aeb038c60530f46",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "type": "github"
+      }
+    },
     "gitignore": {
       "inputs": {
         "nixpkgs": [
@@ -364,6 +390,28 @@
         "type": "github"
       }
     },
+    "gitignore_2": {
+      "inputs": {
+        "nixpkgs": [
+          "simple-nixos-mailserver",
+          "git-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -580,19 +628,20 @@
         "type": "indirect"
       }
     },
-    "nixpkgs-24_05": {
+    "nixpkgs-25_05": {
       "locked": {
-        "lastModified": 1717144377,
-        "narHash": "sha256-F/TKWETwB5RaR8owkPPi+SPJh83AQsm6KrQAlJ8v/uA=",
+        "lastModified": 1748162331,
+        "narHash": "sha256-rqc2RKYTxP3tbjA+PB3VMRQNnjesrT0pEofXQTrMsS8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "805a384895c696f802a9bf5bf4720f37385df547",
+        "rev": "7c43f080a7f28b2774f3b3f43234ca11661bf334",
         "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
-        "ref": "nixos-24.05",
-        "type": "indirect"
+        "owner": "NixOS",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
       }
     },
     "nixpkgs-lib": {
@@ -791,23 +840,23 @@
       "inputs": {
         "blobs": "blobs",
         "flake-compat": "flake-compat_3",
+        "git-hooks": "git-hooks",
         "nixpkgs": [
           "nixpkgs"
         ],
-        "nixpkgs-24_05": "nixpkgs-24_05",
-        "utils": "utils"
+        "nixpkgs-25_05": "nixpkgs-25_05"
       },
       "locked": {
-        "lastModified": 1734885828,
-        "narHash": "sha256-G0fB1YBlkalu8lLGRB07K8CpUWNVd+unfrjNomSL7SM=",
+        "lastModified": 1747965231,
+        "narHash": "sha256-BW3ktviEhfCN/z3+kEyzpDKAI8qFTwO7+S0NVA0C90o=",
         "owner": "simple-nixos-mailserver",
         "repo": "nixos-mailserver",
-        "rev": "636b82f4175e3f6b1e80d2189bb0469e2ae01a55",
+        "rev": "53007af63fade28853408370c4c600a63dd97f41",
         "type": "gitlab"
       },
       "original": {
         "owner": "simple-nixos-mailserver",
-        "ref": "nixos-24.05",
+        "ref": "nixos-25.05",
         "repo": "nixos-mailserver",
         "type": "gitlab"
       }
@@ -968,21 +1017,6 @@
         "type": "github"
       }
     },
-    "systems_7": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    },
     "unstable": {
       "locked": {
         "lastModified": 1748190013,
@@ -998,24 +1032,6 @@
         "repo": "nixpkgs",
         "type": "github"
       }
-    },
-    "utils": {
-      "inputs": {
-        "systems": "systems_6"
-      },
-      "locked": {
-        "lastModified": 1709126324,
-        "narHash": "sha256-q6EQdSeUZOG26WelxqkmR7kArjgWCdw5sfJVHPH/7j8=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "d465f4819400de7c8d874d50b982301f28a84605",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
     }
   },
   "root": "root",

flake.nix

@@ -60,7 +60,7 @@
       # inputs.nixpkgs.follows = "nixpkgs";
     };
 
-    simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-24.05";
+    simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-25.05";
     simple-nixos-mailserver.inputs.nixpkgs.follows = "nixpkgs";
 
     claude.url = "github:k3d3/claude-desktop-linux-flake";