chore: fix nix

.gitignore

@@ -4,6 +4,7 @@
 
 # Nix
 /.direnv
+/Cargo.nix
 
 # Environment
 .envrc

flake.nix

@@ -1,24 +1,32 @@
 {
   description = "IMPHNEN CMS API Nix Flake";
+
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
   };
+
   outputs = {
     self,
     nixpkgs,
   }: let
     supportedSystems = ["x86_64-linux" "x86_64-darwin" "aarch64-darwin" "aarch64-linux"];
+    pkgsFor = system:
+      import nixpkgs {
+        inherit system;
+        config = {
+          allowUnfree = true;
+        };
+      };
     forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
-    pkgsFor = nixpkgs.legacyPackages;
   in {
     packages = forAllSystems (system: {
-      default = pkgsFor.${system}.callPackage ./default.nix {};
+      default = (pkgsFor system).callPackage ./default.nix {};
     });
     devShells = forAllSystems (system: {
-      default = pkgsFor.${system}.callPackage ./shell.nix {};
+      default = (pkgsFor system).callPackage ./shell.nix {};
     });
     dockerImages = forAllSystems (system: {
-      tryOutApi = pkgsFor.${system}.callPackage ./docker.nix {};
+      tryOutApi = (pkgsFor system).callPackage ./docker.nix {};
     });
   };
 }