Init:start-nix

modules/system/nix.nix

@@ -0,0 +1,50 @@
+{
+  inputs,
+  lib,
+  ...
+}:
+with lib; {
+  environment.etc."nix/inputs/nixpkgs".source = "${inputs.nixpkgs}";
+  nix = {
+    channel.enable = false;
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 7d";
+    };
+    optimise = {
+      automatic = true;
+      dates = ["weekly"];
+    };
+    # package = pkgs.lix; # use lix instead of nix would cause clan-cli error
+    registry.nixpkgs.flake = inputs.nixpkgs;
+    settings = {
+      auto-optimise-store = true;
+      builders-use-substitutes = true;
+      experimental-features = ["nix-command" "flakes"];
+      connect-timeout = 5;
+      gc-keep-derivations = false;
+      gc-keep-outputs = false;
+      keep-going = true;
+      log-lines = 25;
+      nix-path = mkForce "nixpkgs=/etc/nix/inputs/nixpkgs";
+      substituters = [
+        "https://cache.garnix.io" # See https://github.com/daeuniverse/flake.nix
+        "https://cache.nixos.org" # See https://nixos.wiki/wiki/Binary_Cache
+        "https://chaotic-nyx.cachix.org" # See https://github.com/chaotic-cx/nyx
+        "https://nix-community.cachix.org" # See https://nix-community.org/cache/
+      ];
+      trusted-public-keys = [
+        "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
+        "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+        "chaotic-nyx.cachix.org-1:HfnXSw4pj95iI/n17rIDy40agHj12WfF+Gqk6SonIT8="
+        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+      ];
+      warn-dirty = false;
+    };
+  };
+  nixpkgs = {
+    config.allowUnfree = false;
+    hostPlatform = "x86_64-linux";
+  };
+}