Add slim

modules/slim.nix

@@ -0,0 +1,23 @@
+{ config, lib, libS, ... }:
+
+let
+  cfg = config.slim;
+in
+{
+  options.slim = {
+    enable = libS.mkOpinionatedOption "disable some usual rarely used things to slim down the system";
+  };
+
+  config = lib.mkIf cfg.enable {
+    documentation = {
+      # html docs and info are not required, man pages are enough
+      doc.enable = false;
+      info.enable = false;
+    };
+
+    environment.defaultPackages = lib.mkForce [ ];
+
+    # durring testing only 550K-650K of the tmpfs where used
+    security.wrapperDirSize = "10M";
+  };
+}