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/amuled.nix

@@ -0,0 +1,83 @@
+{ config, lib, options, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.amule;
+  opt = options.services.amule;
+  user = if cfg.user != null then cfg.user else "amule";
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.amule = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to run the AMule daemon. You need to manually run "amuled --ec-config" to configure the service for the first time.
+        '';
+      };
+
+      dataDir = mkOption {
+        type = types.str;
+        default = "/home/${user}/";
+        defaultText = literalExpression ''
+          "/home/''${config.${opt.user}}/"
+        '';
+        description = ''
+          The directory holding configuration, incoming and temporary files.
+        '';
+      };
+
+      user = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = ''
+          The user the AMule daemon should run as.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    users.users = mkIf (cfg.user == null) [
+      { name = "amule";
+        description = "AMule daemon";
+        group = "amule";
+        uid = config.ids.uids.amule;
+      } ];
+
+    users.groups = mkIf (cfg.user == null) [
+      { name = "amule";
+        gid = config.ids.gids.amule;
+      } ];
+
+    systemd.services.amuled = {
+      description = "AMule daemon";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+
+      preStart = ''
+        mkdir -p ${cfg.dataDir}
+        chown ${user} ${cfg.dataDir}
+      '';
+
+      script = ''
+        ${pkgs.su}/bin/su -s ${pkgs.runtimeShell} ${user} \
+            -c 'HOME="${cfg.dataDir}" ${pkgs.amule-daemon}/bin/amuled'
+      '';
+    };
+  };
+}