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/web-apps/whitebophir.nix

@@ -0,0 +1,52 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.whitebophir;
+in {
+  options = {
+    services.whitebophir = {
+      enable = mkEnableOption "whitebophir, an online collaborative whiteboard server (persistent state will be maintained under <filename>/var/lib/whitebophir</filename>)";
+
+      package = mkOption {
+        default = pkgs.whitebophir;
+        defaultText = literalExpression "pkgs.whitebophir";
+        type = types.package;
+        description = "Whitebophir package to use.";
+      };
+
+      listenAddress = mkOption {
+        type = types.str;
+        default = "0.0.0.0";
+        description = "Address to listen on (use 0.0.0.0 to allow access from any address).";
+      };
+
+      port = mkOption {
+        type = types.port;
+        default = 5001;
+        description = "Port to bind to.";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.whitebophir = {
+      description = "Whitebophir Service";
+      wantedBy    = [ "multi-user.target" ];
+      after       = [ "network.target" ];
+      environment = {
+        PORT            = toString cfg.port;
+        HOST            = toString cfg.listenAddress;
+        WBO_HISTORY_DIR = "/var/lib/whitebophir";
+      };
+
+      serviceConfig = {
+        DynamicUser    = true;
+        ExecStart      = "${cfg.package}/bin/whitebophir";
+        Restart        = "always";
+        StateDirectory = "whitebophir";
+      };
+    };
+  };
+}