flake: remove flake-util and add formatter

flake.lock

@@ -1,30 +1,12 @@
 {
   "nodes": {
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1701680307,
-        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1701539137,
-        "narHash": "sha256-nVO/5QYpf1GwjvtpXhyxx5M3U/WN0MwBro4Lsk+9mL0=",
+        "lastModified": 1702233072,
+        "narHash": "sha256-H5G2wgbim2Ku6G6w+NSaQaauv6B6DlPhY9fMvArKqRo=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "933d7dc155096e7575d207be6fb7792bc9f34f6d",
+        "rev": "781e2a9797ecf0f146e81425c822dca69fe4a348",
         "type": "github"
       },
       "original": {
@@ -36,24 +18,8 @@
     },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
-    },
-    "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

@@ -1,24 +1,25 @@
 {
-  inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11";
-    flake-utils.url = "github:numtide/flake-utils";
-  };
-  outputs = { nixpkgs, flake-utils, ... }: flake-utils.lib.eachDefaultSystem (system:
-    let
-      pkgs = import nixpkgs {
-        inherit system;
-      };
+  inputs = { nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11"; };
+  outputs = { nixpkgs, ... }:
 
-    in rec {
-      devShell = pkgs.mkShell {
+    let
+
+      pkgs = import nixpkgs { system = "x86_64-linux"; };
+
+    in
+    rec {
+      formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt;
+      devShell.x86_64-linux = pkgs.mkShell {
         name = "WRPLL-sim";
         venvDir = "./.venv";
-        buildInputs = with pkgs.python3Packages; [
-          python
-          numba
-          numpy
-          notebook # use jupyter notebook without missing libstdc++.so.6
-          venvShellHook
+        buildInputs = with pkgs; [
+          nixpkgs-fmt
+          python3Packages.python
+          python3Packages.numba
+          python3Packages.numpy
+          python3Packages.notebook # use jupyter notebook without missing libstdc++.so.6
+          python3Packages.venvShellHook
+
         ];
 
         # Only run once when venv is created
@@ -33,6 +34,5 @@
         '';
 
       };
-    }
-  );
-}
+    };
+}