Use eachDefaultSystem

flake.lock

@@ -18,7 +18,41 @@
     },
     "root": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "utils": "utils"
+      }
+    },
+    "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": 1726560853,
+        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
       }
     }
   },

flake.nix

@@ -3,13 +3,19 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    utils.url = "github:numtide/flake-utils";
   };
 
   outputs =
-    { self, nixpkgs }:
+    inputs:
     let
-      system = "x86_64-linux";
+      inherit (inputs) self;
-      pkgs = nixpkgs.legacyPackages.${system};
+      inherit (inputs.nixpkgs) lib;
+    in
+    inputs.utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = inputs.nixpkgs.legacyPackages.${system};
         kernel = pkgs.linux_latest;
         kmd = import ./pkgs/kmd { inherit pkgs kernel; };
         sfpi = import ./pkgs/sfpi { inherit pkgs; };
@@ -27,7 +33,7 @@
         umd = import ./pkgs/umd { inherit pkgs; };
       in
       {
-      packages.${system} = {
+        packages = {
           kmd = kmd.kmd;
           udev-rules = kmd.udev-rules;
           kmd-test = kmd.test;
@@ -39,10 +45,10 @@
           tools-common = common;
           flash = flash;
           umd = umd;
+          default = self.packages.${system}.smi;
         };
 
-      formatter.${system} = pkgs.nixfmt-rfc-style;
+        formatter = pkgs.nixfmt-rfc-style;
-
+      }
-      defaultPackage.${system} = self.packages.${system}.smi;
+    );
-    };
 }