flake: simplify Lix setup

Flake lock file updates:

• Updated input 'home-manager':
    'github:nix-community/home-manager/f21d9167782c086a33ad53e2311854a8f13c281e' (2025-09-14)
  → 'github:nix-community/home-manager/3b955f5f0a942f9f60cdc9cacb7844335d0f21c3' (2025-09-21)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/9a094440e02a699be5c57453a092a8baf569bdad' (2025-09-14)
  → 'github:NixOS/nixpkgs/b2a3852bd078e68dd2b3dfa8c00c67af1f0a7d20' (2025-09-20)

base/nix.nix

@@ -2,7 +2,7 @@
   nixpkgs.config.allowUnfree = true;
 
   nix = {
-    package = pkgs.nixStable;
+    package = pkgs.lixPackageSets.latest.lix;
 
     gc = {
       automatic = true;

flake.lock

@@ -99,39 +99,6 @@
         "type": "github"
       }
     },
-    "flake-utils_3": {
-      "inputs": {
-        "systems": "systems_4"
-      },
-      "locked": {
-        "lastModified": 1731533236,
-        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "flakey-profile": {
-      "locked": {
-        "lastModified": 1712898590,
-        "narHash": "sha256-FhGIEU93VHAChKEXx905TSiPZKga69bWl1VB37FK//I=",
-        "owner": "lf-",
-        "repo": "flakey-profile",
-        "rev": "243c903fd8eadc0f63d205665a92d4df91d42d9d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "lf-",
-        "repo": "flakey-profile",
-        "type": "github"
-      }
-    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -160,11 +127,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1757808926,
-        "narHash": "sha256-K6PEI5PYY94TVMH0mX3MbZNYFme7oNRKml/85BpRRAo=",
+        "lastModified": 1758463745,
+        "narHash": "sha256-uhzsV0Q0I9j2y/rfweWeGif5AWe0MGrgZ/3TjpDYdGA=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "f21d9167782c086a33ad53e2311854a8f13c281e",
+        "rev": "3b955f5f0a942f9f60cdc9cacb7844335d0f21c3",
         "type": "github"
       },
       "original": {
@@ -197,41 +164,6 @@
         "type": "github"
       }
     },
-    "lix": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1753306924,
-        "narHash": "sha256-jLCEW0FvjFhC+c4RHzH+xbkSOxrnpFHnhjOw6sudhx0=",
-        "rev": "1a4393d0aac31aba21f5737ede1b171e11336d77",
-        "type": "tarball",
-        "url": "https://git.lix.systems/api/v1/repos/lix-project/lix/archive/1a4393d0aac31aba21f5737ede1b171e11336d77.tar.gz"
-      },
-      "original": {
-        "type": "tarball",
-        "url": "https://git.lix.systems/lix-project/lix/archive/release-2.93.tar.gz"
-      }
-    },
-    "lix-module": {
-      "inputs": {
-        "flake-utils": "flake-utils_3",
-        "flakey-profile": "flakey-profile",
-        "lix": "lix",
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1753282722,
-        "narHash": "sha256-KYMUrTV7H/RR5/HRnjV5R3rRIuBXMemyJzTLi50NFTs=",
-        "rev": "46a9e8fcfe4be72b4c7c8082ee11d2c42da1e873",
-        "type": "tarball",
-        "url": "https://git.lix.systems/api/v1/repos/lix-project/nixos-module/archive/46a9e8fcfe4be72b4c7c8082ee11d2c42da1e873.tar.gz"
-      },
-      "original": {
-        "type": "tarball",
-        "url": "https://git.lix.systems/lix-project/nixos-module/archive/2.93.3-1.tar.gz"
-      }
-    },
     "nixos-hardware": {
       "locked": {
         "lastModified": 1757943327,
@@ -298,11 +230,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1757810152,
-        "narHash": "sha256-Vp9K5ol6h0J90jG7Rm4RWZsCB3x7v5VPx588TQ1dkfs=",
+        "lastModified": 1758346548,
+        "narHash": "sha256-afXE7AJ7MY6wY1pg/Y6UPHNYPy5GtUKeBkrZZ/gC71E=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9a094440e02a699be5c57453a092a8baf569bdad",
+        "rev": "b2a3852bd078e68dd2b3dfa8c00c67af1f0a7d20",
         "type": "github"
       },
       "original": {
@@ -319,7 +251,6 @@
         "flake-utils": "flake-utils",
         "home-manager": "home-manager_2",
         "jujutsu": "jujutsu",
-        "lix-module": "lix-module",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs_3",
         "nixpkgs-unstable-small": "nixpkgs-unstable-small"
@@ -390,21 +321,6 @@
         "repo": "default",
         "type": "github"
       }
-    },
-    "systems_4": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
     }
   },
   "root": "root",

flake.nix

@@ -50,11 +50,6 @@
       ref = "master";
     };
 
-    lix-module = {
-      url = "https://git.lix.systems/lix-project/nixos-module/archive/2.93.3-1.tar.gz";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
-
     jujutsu = {
       type = "github";
       owner = "jj-vcs";
@@ -70,7 +65,6 @@
     home-manager,
     agenix,
     disko,
-    lix-module,
     ...
   } @ inputs:
     {
@@ -112,7 +106,6 @@
           [
             agenix.nixosModules.default
             home-manager.nixosModules.default
-            lix-module.nixosModules.default
             {
               nixpkgs = {
                 overlays = shared_overlays;