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/virtualisation/waydroid.nix

@@ -0,0 +1,75 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.virtualisation.waydroid;
+  kernelPackages = config.boot.kernelPackages;
+  waydroidGbinderConf = pkgs.writeText "waydroid.conf" ''
+    [Protocol]
+    /dev/binder = aidl2
+    /dev/vndbinder = aidl2
+    /dev/hwbinder = hidl
+
+    [ServiceManager]
+    /dev/binder = aidl2
+    /dev/vndbinder = aidl2
+    /dev/hwbinder = hidl
+  '';
+
+in
+{
+
+  options.virtualisation.waydroid = {
+    enable = mkEnableOption "Waydroid";
+  };
+
+  config = mkIf cfg.enable {
+    assertions = singleton {
+      assertion = versionAtLeast (getVersion config.boot.kernelPackages.kernel) "4.18";
+      message = "Waydroid needs user namespace support to work properly";
+    };
+
+    system.requiredKernelConfig = with config.lib.kernelConfig; [
+      (isEnabled "ANDROID_BINDER_IPC")
+      (isEnabled "ANDROID_BINDERFS")
+      (isEnabled "ASHMEM")
+    ];
+
+    /* NOTE: we always enable this flag even if CONFIG_PSI_DEFAULT_DISABLED is not on
+      as reading the kernel config is not always possible and on kernels where it's
+      already on it will be no-op
+    */
+    boot.kernelParams = [ "psi=1" ];
+
+    environment.etc."gbinder.d/waydroid.conf".source = waydroidGbinderConf;
+
+    environment.systemPackages = with pkgs; [ waydroid ];
+
+    networking.firewall.trustedInterfaces = [ "waydroid0" ];
+
+    virtualisation.lxc.enable = true;
+
+    systemd.services.waydroid-container = {
+      description = "Waydroid Container";
+
+      wantedBy = [ "multi-user.target" ];
+
+      unitConfig = {
+        ConditionPathExists = "/var/lib/waydroid/lxc/waydroid";
+      };
+
+      serviceConfig = {
+        ExecStart = "${pkgs.waydroid}/bin/waydroid container start";
+        ExecStop = "${pkgs.waydroid}/bin/waydroid container stop";
+        ExecStopPost = "${pkgs.waydroid}/bin/waydroid session stop";
+      };
+    };
+
+    systemd.tmpfiles.rules = [
+      "d /var/lib/misc 0755 root root -" # for dnsmasq.leases
+    ];
+  };
+
+}