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/charybdis.nix

@@ -0,0 +1,114 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkEnableOption mkIf mkOption singleton types;
+  inherit (pkgs) coreutils charybdis;
+  cfg = config.services.charybdis;
+
+  configFile = pkgs.writeText "charybdis.conf" ''
+    ${cfg.config}
+  '';
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.charybdis = {
+
+      enable = mkEnableOption "Charybdis IRC daemon";
+
+      config = mkOption {
+        type = types.str;
+        description = ''
+          Charybdis IRC daemon configuration file.
+        '';
+      };
+
+      statedir = mkOption {
+        type = types.path;
+        default = "/var/lib/charybdis";
+        description = ''
+          Location of the state directory of charybdis.
+        '';
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "ircd";
+        description = ''
+          Charybdis IRC daemon user.
+        '';
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "ircd";
+        description = ''
+          Charybdis IRC daemon group.
+        '';
+      };
+
+      motd = mkOption {
+        type = types.nullOr types.lines;
+        default = null;
+        description = ''
+          Charybdis MOTD text.
+
+          Charybdis will read its MOTD from /etc/charybdis/ircd.motd .
+          If set, the value of this option will be written to this path.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable (lib.mkMerge [
+    {
+      users.users.${cfg.user} = {
+        description = "Charybdis IRC daemon user";
+        uid = config.ids.uids.ircd;
+        group = cfg.group;
+      };
+
+      users.groups.${cfg.group} = {
+        gid = config.ids.gids.ircd;
+      };
+
+      systemd.tmpfiles.rules = [
+        "d ${cfg.statedir} - ${cfg.user} ${cfg.group} - -"
+      ];
+
+      environment.etc."charybdis/ircd.conf".source = configFile;
+
+      systemd.services.charybdis = {
+        description = "Charybdis IRC daemon";
+        wantedBy = [ "multi-user.target" ];
+        reloadIfChanged = true;
+        restartTriggers = [
+          configFile
+        ];
+        environment = {
+          BANDB_DBPATH = "${cfg.statedir}/ban.db";
+        };
+        serviceConfig = {
+          ExecStart   = "${charybdis}/bin/charybdis -foreground -logfile /dev/stdout -configfile /etc/charybdis/ircd.conf";
+          ExecReload = "${coreutils}/bin/kill -HUP $MAINPID";
+          Group = cfg.group;
+          User = cfg.user;
+        };
+      };
+
+    }
+
+    (mkIf (cfg.motd != null) {
+      environment.etc."charybdis/ircd.motd".text = cfg.motd;
+    })
+  ]);
+}