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/shairport-sync.nix

@@ -0,0 +1,112 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.shairport-sync;
+
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.shairport-sync = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Enable the shairport-sync daemon.
+
+          Running with a local system-wide or remote pulseaudio server
+          is recommended.
+        '';
+      };
+
+      arguments = mkOption {
+        type = types.str;
+        default = "-v -o pa";
+        description = ''
+          Arguments to pass to the daemon. Defaults to a local pulseaudio
+          server.
+        '';
+      };
+
+      openFirewall = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to automatically open ports in the firewall.
+        '';
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "shairport";
+        description = ''
+          User account name under which to run shairport-sync. The account
+          will be created.
+        '';
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "shairport";
+        description = ''
+          Group account name under which to run shairport-sync. The account
+          will be created.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf config.services.shairport-sync.enable {
+
+    services.avahi.enable = true;
+    services.avahi.publish.enable = true;
+    services.avahi.publish.userServices = true;
+
+    users = {
+      users.${cfg.user} = {
+        description = "Shairport user";
+        isSystemUser = true;
+        createHome = true;
+        home = "/var/lib/shairport-sync";
+        group = cfg.group;
+        extraGroups = [ "audio" ] ++ optional config.hardware.pulseaudio.enable "pulse";
+      };
+      groups.${cfg.group} = {};
+    };
+
+    networking.firewall = mkIf cfg.openFirewall {
+      allowedTCPPorts = [ 5000 ];
+      allowedUDPPortRanges = [ { from = 6001; to = 6011; } ];
+    };
+
+    systemd.services.shairport-sync =
+      {
+        description = "shairport-sync";
+        after = [ "network.target" "avahi-daemon.service" ];
+        wantedBy = [ "multi-user.target" ];
+        serviceConfig = {
+          User = cfg.user;
+          Group = cfg.group;
+          ExecStart = "${pkgs.shairport-sync}/bin/shairport-sync ${cfg.arguments}";
+          RuntimeDirectory = "shairport-sync";
+        };
+      };
+
+    environment.systemPackages = [ pkgs.shairport-sync ];
+
+  };
+
+}