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/weechat.nix

@@ -0,0 +1,63 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.weechat;
+in
+
+{
+  options.services.weechat = {
+    enable = mkEnableOption "weechat";
+    root = mkOption {
+      description = "Weechat state directory.";
+      type = types.str;
+      default = "/var/lib/weechat";
+    };
+    sessionName = mkOption {
+      description = "Name of the `screen' session for weechat.";
+      default = "weechat-screen";
+      type = types.str;
+    };
+    binary = mkOption {
+      type = types.path;
+      description = "Binary to execute.";
+      default = "${pkgs.weechat}/bin/weechat";
+      defaultText = literalExpression ''"''${pkgs.weechat}/bin/weechat"'';
+      example = literalExpression ''"''${pkgs.weechat}/bin/weechat-headless"'';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    users = {
+      groups.weechat = {};
+      users.weechat = {
+        createHome = true;
+        group = "weechat";
+        home = cfg.root;
+        isSystemUser = true;
+      };
+    };
+
+    systemd.services.weechat = {
+      environment.WEECHAT_HOME = cfg.root;
+      serviceConfig = {
+        User = "weechat";
+        Group = "weechat";
+        RemainAfterExit = "yes";
+      };
+      script = "exec ${config.security.wrapperDir}/screen -Dm -S ${cfg.sessionName} ${cfg.binary}";
+      wantedBy = [ "multi-user.target" ];
+      wants = [ "network.target" ];
+    };
+
+    security.wrappers.screen =
+      { setuid = true;
+        owner = "root";
+        group = "root";
+        source = "${pkgs.screen}/bin/screen";
+      };
+  };
+
+  meta.doc = ./weechat.xml;
+}