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/audio/slimserver.nix

@@ -0,0 +1,73 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.slimserver;
+
+in {
+  options = {
+
+    services.slimserver = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to enable slimserver.
+        '';
+      };
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.slimserver;
+        defaultText = literalExpression "pkgs.slimserver";
+        description = "Slimserver package to use.";
+      };
+
+      dataDir = mkOption {
+        type = types.path;
+        default = "/var/lib/slimserver";
+        description = ''
+          The directory where slimserver stores its state, tag cache,
+          playlists etc.
+        '';
+      };
+    };
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    systemd.tmpfiles.rules = [
+      "d '${cfg.dataDir}' - slimserver slimserver - -"
+    ];
+
+    systemd.services.slimserver = {
+      after = [ "network.target" ];
+      description = "Slim Server for Logitech Squeezebox Players";
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        User = "slimserver";
+        # Issue 40589: Disable broken image/video support (audio still works!)
+        ExecStart = "${cfg.package}/slimserver.pl --logdir ${cfg.dataDir}/logs --prefsdir ${cfg.dataDir}/prefs --cachedir ${cfg.dataDir}/cache --noimage --novideo";
+      };
+    };
+
+    users = {
+      users.slimserver = {
+        description = "Slimserver daemon user";
+        home = cfg.dataDir;
+        group = "slimserver";
+        isSystemUser = true;
+      };
+      groups.slimserver = {};
+    };
+  };
+
+}
+