uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

nixos/modules/services/networking/nar-serve.nix

@@ -0,0 +1,55 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+let
+  cfg = config.services.nar-serve;
+in
+{
+  meta = {
+    maintainers = [ maintainers.rizary ];
+  };
+  options = {
+    services.nar-serve = {
+      enable = mkEnableOption "Serve NAR file contents via HTTP";
+
+      port = mkOption {
+        type = types.port;
+        default = 8383;
+        description = ''
+          Port number where nar-serve will listen on.
+        '';
+      };
+
+      cacheURL = mkOption {
+        type = types.str;
+        default = "https://cache.nixos.org/";
+        description = ''
+          Binary cache URL to connect to.
+
+          The URL format is compatible with the nix remote url style, such as:
+          - http://, https:// for binary caches via HTTP or HTTPS
+          - s3:// for binary caches stored in Amazon S3
+          - gs:// for binary caches stored in Google Cloud Storage
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.nar-serve = {
+      description = "NAR server";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      environment.PORT = toString cfg.port;
+      environment.NAR_CACHE_URL = cfg.cacheURL;
+
+      serviceConfig = {
+        Restart = "always";
+        RestartSec = "5s";
+        ExecStart = "${pkgs.nar-serve}/bin/nar-serve";
+        DynamicUser = true;
+      };
+    };
+  };
+}