Added home-made rustnet.nix and added it to puter

hosts/puter/default.nix

@@ -25,6 +25,8 @@
     ../../modules/common/libvirt.nix
     ../../modules/common/keyd.nix
     ../../modules/common/unbound-cloud.nix
+    
+    (callPackage .../../modules/common/rustnet.nix {})
   ];
   networking.hostName = "puter";
   # This will be overridden by system/default.nix

modules/common/rustnet.nix

@@ -0,0 +1,28 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.stdenv.mkDerivation rec {
+  pname = "rustnet";
+  version = "0.18.0";
+
+  src = pkgs.fetchurl {
+    url = "https://github.com/domcyrus/rustnet/releases/download/v${version}/rustnet-v${version}-x86_64-unknown-linux-musl.tar.gz";
+    hash = "sha256-yAjemn3Qi0GjTG5u7UEXHBJFTCd6ctVacV5UoAX7bWA=";
+  };
+
+  sourceRoot = "rustnet-v${version}-x86_64-unknown-linux-musl";
+
+  installPhase = ''
+    runHook preInstall
+    # 1. Install the binary
+    install -m755 -D rustnet $out/bin/rustnet
+    runHook postInstall
+  '';
+
+  meta = with pkgs.lib; {
+    description = "A cross-platform network monitoring terminal UI tool built with Rust.";
+    #maintainers = lib.maintainers.0x545a;
+    #license = lib.licenses.asl20;
+    homepage = "https://github.com/domcyrus/rustnet";
+    platforms = [ "x86_64-linux" ];
+  };
+}