refactor: nix flake (#180)

flake.lock

@@ -1,58 +1,25 @@
 {
   "nodes": {
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1710146030,
-        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1714495772,
-        "narHash": "sha256-BVkhvsIatul5lXMrnPvgKkpxL3zZGQlPbTgDlFJiYCo=",
+        "lastModified": 1715961556,
+        "narHash": "sha256-+NpbZRCRisUHKQJZF3CT+xn14ZZQO+KjxIIanH3Pvn4=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "c82cda9c0600a2785cda8e60962bcc9cc86862db",
+        "rev": "4a6b83b05df1a8bd7d99095ec4b4d271f2956b64",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "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

@@ -1,17 +1,18 @@
 {
-  inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs";
-    flake-utils.url = "github:numtide/flake-utils";
-  };
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
 
-  outputs = { self, nixpkgs, flake-utils, ... }:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        pkgs = import nixpkgs { inherit system; };
-      in
-      {
-        devShells.default = import ./shell.nix { inherit pkgs; };
-      }
-    );
+  outputs =
+    { nixpkgs, ... }:
+    let
+      forAllSystems =
+        function:
+        nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (
+          system: function nixpkgs.legacyPackages.${system}
+        );
+    in
+    {
+      devShells = forAllSystems (pkgs: {
+        default = pkgs.callPackage ./shell.nix { };
+      });
+    };
 }
-

shell.nix

@@ -1,10 +1,11 @@
-{ pkgs ? import <nixpkgs> { } }:
-
+{
+  pkgs ? import <nixpkgs> { },
+}:
 pkgs.mkShell {
   name = "dev-shell";
   buildInputs = with pkgs; [
     python311
     python311Packages.catppuccin
+    sassc
   ];
 }
-