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/misc/irkerd.nix

@@ -0,0 +1,67 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.irkerd;
+  ports = [ 6659 ];
+in
+{
+  options.services.irkerd = {
+    enable = mkOption {
+      description = "Whether to enable irker, an IRC notification daemon.";
+      default = false;
+      type = types.bool;
+    };
+
+    openPorts = mkOption {
+      description = "Open ports in the firewall for irkerd";
+      default = false;
+      type = types.bool;
+    };
+
+    listenAddress = mkOption {
+      default = "localhost";
+      example = "0.0.0.0";
+      type = types.str;
+      description = ''
+        Specifies the bind address on which the irker daemon listens.
+        The default is localhost.
+
+        Irker authors strongly warn about the risks of running this on
+        a publicly accessible interface, so change this with caution.
+      '';
+    };
+
+    nick = mkOption {
+      default = "irker";
+      type = types.str;
+      description = "Nick to use for irker";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.irkerd = {
+      description = "Internet Relay Chat (IRC) notification daemon";
+      documentation = [ "man:irkerd(8)" "man:irkerhook(1)" "man:irk(1)" ];
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        ExecStart = "${pkgs.irker}/bin/irkerd -H ${cfg.listenAddress} -n ${cfg.nick}";
+        User = "irkerd";
+      };
+    };
+
+    environment.systemPackages = [ pkgs.irker ];
+
+    users.users.irkerd = {
+      description = "Irker daemon user";
+      isSystemUser = true;
+      group = "irkerd";
+    };
+    users.groups.irkerd = {};
+
+    networking.firewall.allowedTCPPorts = mkIf cfg.openPorts ports;
+    networking.firewall.allowedUDPPorts = mkIf cfg.openPorts ports;
+  };
+}