feat: simplify flake.nix, correct package derivation

default.nix

@@ -0,0 +1,7 @@
+{pkgs ? import <nixpkgs> {}}:
+pkgs.rustPlatform.buildRustPackage {
+  pname = "pumo-system-information";
+  version = "0.1.0";
+  cargoLock.lockFile = ./Cargo.lock;
+  src = pkgs.lib.cleanSource ./.;
+}

flake.lock

@@ -1,23 +1,5 @@
 {
   "nodes": {
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "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"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1747744144,
@@ -36,7 +18,6 @@
     },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs",
         "rust-overlay": "rust-overlay"
       }
@@ -48,11 +29,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1747967795,
-        "narHash": "sha256-76s4jDRbQzxRO+5y8ilMp5V30qVgY9R6n8U7aOap8ig=",
+        "lastModified": 1748054080,
+        "narHash": "sha256-rwFiLLNCwkj9bqePtH1sMqzs1xmohE0Ojq249piMzF4=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "f1d5bfa8c692cacd798a3e1fb93d54c1b9ac701a",
+        "rev": "2221d8d53c128beb69346fa3ab36da3f19bb1691",
         "type": "github"
       },
       "original": {
@@ -60,21 +41,6 @@
         "repo": "rust-overlay",
         "type": "github"
       }
-    },
-    "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

@@ -1,61 +1,38 @@
 {
   description = "System information in JSON format for eww";
-
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-    flake-utils = {
-      url = "github:numtide/flake-utils";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
-
-  outputs =
-    {
-      self,
-      nixpkgs,
-      flake-utils,
-      rust-overlay,
-    }:
-    flake-utils.lib.eachSystem [ "x86_64-linux" ] (
-      system:
-      let
-        overlays = [ (import rust-overlay) ];
-        pkgs = import nixpkgs { inherit system overlays; };
-        rustVersion = (pkgs.rust-bin.fromRustupToolchainFile ./rustup-toolchain.toml);
-        rustPlatform = pkgs.makeRustPlatform {
-          cargo = rustVersion;
-          rustc = rustVersion;
-        };
-        appName = "pumo-system-info";
-        appRustBuild = rustPlatform.buildRustPackage {
-          pname = appName;
-          version = "0.1.0";
-          src = ./.;
-          cargoLock.lockFile = ./Cargo.lock;
-          doCheck = true;
-        };
+  outputs = {
+    nixpkgs,
+    rust-overlay,
+    ...
+  }: let
+    supportedSystems = ["x86_64-linux" "aarch64-linux"];
+    forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+    pkgsFor = nixpkgs.legacyPackages;
+  in {
+    packages = forAllSystems (system: {
+      default = pkgsFor.${system}.callPackage ./. {};
+    });
+    formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.alejandra);
+    devShells = forAllSystems (
+      system: let
+        overlays = [(import rust-overlay)];
+        pkgs = import nixpkgs {inherit system overlays;};
+        rustVersion = pkgs.rust-bin.fromRustupToolchainFile ./rustup-toolchain.toml;
       in
-      {
-        packages.pumoSystemInfo = appRustBuild;
-        formatter = nixpkgs.legacyPackages.${system}.nixfmt-rfc-style;
-        defaultPackage = appRustBuild;
-        devShell =
-          with pkgs;
-          mkShell {
-            buildInputs = [
-              bacon
-              cargo
-              cargo-deny
-              cargo-msrv
-              cargo-tarpaulin
-              just
-              rustVersion
-            ];
-          };
-      }
+        pkgs.mkShell {
+          buildInputs = with pkgs; [
+            bacon
+            cargo
+            rustVersion
+          ];
+        }
     );
+  };
 }