flake: add flake-utils input

flake.lock

@@ -65,6 +65,24 @@
         "type": "github"
       }
     },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1692799911,
+        "narHash": "sha256-3eihraek4qL744EvQXsK1Ha6C3CR7nnT8X2qWap4RNk=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "f9e7cf818399d17d347f847525c5a5a8032e4e44",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -175,12 +193,28 @@
       "inputs": {
         "agenix": "agenix",
         "darwin": "darwin_2",
+        "flake-utils": "flake-utils",
         "home-manager": "home-manager_2",
         "impermanence": "impermanence",
         "nixpkgs": "nixpkgs",
         "nixpkgs-chia": "nixpkgs-chia",
         "nixpkgs-unstable": "nixpkgs-unstable"
       }
+    },
+    "systems": {
+      "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

@@ -4,6 +4,8 @@
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
     nixpkgs-chia.url = "github:lourkeur/nixpkgs?rev=e2b683787475d344892bddea9ab413dc611b894e";
 
+    flake-utils.url = "github:numtide/flake-utils";
+
     darwin.url = "github:lnl7/nix-darwin/master";
     darwin.inputs.nixpkgs.follows = "nixpkgs";
 
@@ -18,7 +20,7 @@
 
   description = "Hillion Nix flake";
 
-  outputs = { self, nixpkgs, nixpkgs-unstable, nixpkgs-chia, agenix, home-manager, impermanence, darwin, ... }@inputs: {
+  outputs = { self, nixpkgs, nixpkgs-unstable, nixpkgs-chia, flake-utils, agenix, home-manager, impermanence, darwin, ... }@inputs: {
     nixosConfigurations =
       let
         fqdns = builtins.attrNames (builtins.readDir ./hosts);
@@ -77,7 +79,7 @@
       in
       nixpkgs.lib.genAttrs (builtins.filter isDarwin hosts) mkHost;
 
-    formatter."x86_64-linux" = nixpkgs.legacyPackages."x86_64-linux".nixpkgs-fmt;
-    formatter."aarch64-darwin" = nixpkgs.legacyPackages."aarch64-darwin".nixpkgs-fmt;
-  };
+  } // flake-utils.lib.eachDefaultSystem (system: {
+    formatter = nixpkgs.legacyPackages.${system}.nixpkgs-fmt;
+  });
 }