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/ombi.nix

@@ -0,0 +1,81 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let cfg = config.services.ombi;
+
+in {
+  options = {
+    services.ombi = {
+      enable = mkEnableOption ''
+        Ombi.
+        Optionally see <link xlink:href="https://docs.ombi.app/info/reverse-proxy"/>
+        on how to set up a reverse proxy
+      '';
+
+      dataDir = mkOption {
+        type = types.str;
+        default = "/var/lib/ombi";
+        description = "The directory where Ombi stores its data files.";
+      };
+
+      port = mkOption {
+        type = types.port;
+        default = 5000;
+        description = "The port for the Ombi web interface.";
+      };
+
+      openFirewall = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Open ports in the firewall for the Ombi web interface.";
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "ombi";
+        description = "User account under which Ombi runs.";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "ombi";
+        description = "Group under which Ombi runs.";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.tmpfiles.rules = [
+      "d '${cfg.dataDir}' 0700 ${cfg.user} ${cfg.group} - -"
+    ];
+
+    systemd.services.ombi = {
+      description = "Ombi";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        Type = "simple";
+        User = cfg.user;
+        Group = cfg.group;
+        ExecStart = "${pkgs.ombi}/bin/Ombi --storage '${cfg.dataDir}' --host 'http://*:${toString cfg.port}'";
+        Restart = "on-failure";
+      };
+    };
+
+    networking.firewall = mkIf cfg.openFirewall {
+      allowedTCPPorts = [ cfg.port ];
+    };
+
+    users.users = mkIf (cfg.user == "ombi") {
+      ombi = {
+        isSystemUser = true;
+        group = cfg.group;
+        home = cfg.dataDir;
+      };
+    };
+
+    users.groups = mkIf (cfg.group == "ombi") { ombi = { }; };
+  };
+}