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/ecs-agent.nix

@@ -0,0 +1,45 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.services.ecs-agent;
+in {
+  options.services.ecs-agent = {
+    enable = mkEnableOption "Amazon ECS agent";
+
+    package = mkOption {
+      type = types.path;
+      description = "The ECS agent package to use";
+      default = pkgs.ecs-agent;
+      defaultText = literalExpression "pkgs.ecs-agent";
+    };
+
+    extra-environment = mkOption {
+      type = types.attrsOf types.str;
+      description = "The environment the ECS agent should run with. See the ECS agent documentation for keys that work here.";
+      default = {};
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    # This service doesn't run if docker isn't running, and unlike potentially remote services like e.g., postgresql, docker has
+    # to be running locally so `docker.enable` will always be set if the ECS agent is enabled.
+    virtualisation.docker.enable = true;
+
+    systemd.services.ecs-agent = {
+      inherit (cfg.package.meta) description;
+      after    = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      environment = cfg.extra-environment;
+
+      script = ''
+        if [ ! -z "$ECS_DATADIR" ]; then
+          mkdir -p "$ECS_DATADIR"
+        fi
+        ${cfg.package}/bin/agent
+      '';
+    };
+  };
+}