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/prayer.nix

@@ -0,0 +1,90 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  inherit (pkgs) prayer;
+
+  cfg = config.services.prayer;
+
+  stateDir = "/var/lib/prayer";
+
+  prayerUser = "prayer";
+  prayerGroup = "prayer";
+
+  prayerExtraCfg = pkgs.writeText "extraprayer.cf" ''
+    prefix = "${prayer}"
+    var_prefix = "${stateDir}"
+    prayer_user = "${prayerUser}"
+    prayer_group = "${prayerGroup}"
+    sendmail_path = "/run/wrappers/bin/sendmail"
+
+    use_http_port ${cfg.port}
+
+    ${cfg.extraConfig}
+  '';
+
+  prayerCfg = pkgs.runCommand "prayer.cf" { preferLocalBuild = true; } ''
+    # We have to remove the http_port 80, or it will start a server there
+    cat ${prayer}/etc/prayer.cf | grep -v http_port > $out
+    cat ${prayerExtraCfg} >> $out
+  '';
+
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.prayer = {
+
+      enable = mkEnableOption "the prayer webmail http server";
+
+      port = mkOption {
+        default = 2080;
+        type = types.port;
+        description = ''
+          Port the prayer http server is listening to.
+        '';
+      };
+
+      extraConfig = mkOption {
+        type = types.lines;
+        default = "" ;
+        description = ''
+          Extra configuration. Contents will be added verbatim to the configuration file.
+        '';
+      };
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf config.services.prayer.enable {
+    environment.systemPackages = [ prayer ];
+
+    users.users.${prayerUser} =
+      { uid = config.ids.uids.prayer;
+        description = "Prayer daemon user";
+        home = stateDir;
+      };
+
+    users.groups.${prayerGroup} =
+      { gid = config.ids.gids.prayer; };
+
+    systemd.services.prayer = {
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig.Type = "forking";
+      preStart = ''
+        mkdir -m 0755 -p ${stateDir}
+        chown ${prayerUser}:${prayerGroup} ${stateDir}
+      '';
+      script = "${prayer}/sbin/prayer --config-file=${prayerCfg}";
+    };
+  };
+}