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/monitoring/mimir.nix

@@ -0,0 +1,67 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) escapeShellArgs mkEnableOption mkIf mkOption types;
+
+  cfg = config.services.mimir;
+
+  settingsFormat = pkgs.formats.yaml {};
+in {
+  options.services.mimir = {
+    enable = mkEnableOption "mimir";
+
+    configuration = mkOption {
+      type = (pkgs.formats.json {}).type;
+      default = {};
+      description = ''
+        Specify the configuration for Mimir in Nix.
+      '';
+    };
+
+    configFile = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      description = ''
+        Specify a configuration file that Mimir should use.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    # for mimirtool
+    environment.systemPackages = [ pkgs.mimir ];
+
+    assertions = [{
+      assertion = (
+        (cfg.configuration == {} -> cfg.configFile != null) &&
+        (cfg.configFile != null -> cfg.configuration == {})
+      );
+      message  = ''
+        Please specify either
+        'services.mimir.configuration' or
+        'services.mimir.configFile'.
+      '';
+    }];
+
+    systemd.services.mimir = {
+      description = "mimir Service Daemon";
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = let
+        conf = if cfg.configFile == null
+               then settingsFormat.generate "config.yaml" cfg.configuration
+               else cfg.configFile;
+      in
+      {
+        ExecStart = "${pkgs.mimir}/bin/mimir --config.file=${conf}";
+        DynamicUser = true;
+        Restart = "always";
+        ProtectSystem = "full";
+        DevicePolicy = "closed";
+        NoNewPrivileges = true;
+        WorkingDirectory = "/var/lib/mimir";
+        StateDirectory = "mimir";
+      };
+    };
+  };
+}