added xz support

flake.nix

@@ -0,0 +1,31 @@
+{
+  description = "Spec's NixOS-config";
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+  };
+  outputs = { self, nixpkgs, ... }@inputs:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+    in
+    {
+      devShells.${system}.rust = pkgs.mkShell{
+        buildInputs = with pkgs; [
+          cargo
+          cargo-watch
+          rustc
+          just
+          rustup
+          clippy
+          lolcat
+          rust-analyzer
+          xz  # Add xz (liblzma) to the build inputs
+        ];
+
+        # Add a shellHook to modify PKG_CONFIG_PATH
+        shellHook = ''
+          export PKG_CONFIG_PATH="${pkgs.xz}/lib/pkgconfig:$PKG_CONFIG_PATH"
+        '';
+      };
+    };
+}