first usable configuration

modules/boot.nix

@@ -0,0 +1,39 @@
+{ config, lib, libS, ... }:
+
+let
+  cfg = config.boot;
+in
+{
+  options = {
+    boot = {
+      default = libS.mkOpinionatedOption "enable the boot builder";
+    };
+  };
+
+  config.boot = lib.mkIf cfg.default {
+    supportedFilesystems = [ "zfs" ];
+    tmp.useTmpfs = true;
+    kernelPackages = config.boot.zfs.package.latestCompatibleLinuxPackages;
+    kernelParams = [ "kvm-amd" "nordrand" ];
+    zfs = {            
+      enableUnstable = true;
+      devNodes = "/dev/disk/by-id/";
+      forceImportRoot = true;
+    };
+    loader = {
+      efi = {
+        canTouchEfiVariables = false;
+      };
+      generationsDir.copyKernels = true;
+      grub = {
+        enable = true;
+        copyKernels = true;
+        zfsSupport = true;
+        efiSupport = true;
+        efiInstallAsRemovable = true;
+        fsIdentifier = "uuid";
+        device = "nodev";
+      };
+    };
+  };
+}