Essentially more sw + GRUB live usb trial

Installed and configured Yggdrasil; ported rustnet and install; GRUB
trial of USB Live stick

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1769170682,
-        "narHash": "sha256-oMmN1lVQU0F0W2k6OI3bgdzp2YOHWYUAw79qzDSjenU=",
+        "lastModified": 1770197578,
+        "narHash": "sha256-AYqlWrX09+HvGs8zM6ebZ1pwUqjkfpnv8mewYwAo+iM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c5296fdd05cfa2c187990dd909864da9658df755",
+        "rev": "00c21e4c93d963c50d4c0c89bfa84ed6e0694df2",
         "type": "github"
       },
       "original": {

hosts/puter/default.nix

@@ -2,8 +2,7 @@
   config,
   pkgs,
   ...
-}:
-{  
+}: {
   imports = [
     ./hardware-configuration.nix
     ./syncthing.nix

hosts/puter/hardware-configuration.nix

@@ -42,6 +42,13 @@
     lib.mkDefault config.hardware.enableRedistributableFirmware;
 
   boot.loader.systemd-boot.enable = true;
+  boot.loader.systemd-boot.extraEntries = {
+    "usb-live.conf" = "
+        title USB Live Boot
+        efi /EFI/boot/bootx64.efi
+        options root=/dev/sdb2
+      ";
+  };
   boot.loader.efi.canTouchEfiVariables = true;
   boot.initrd.luks.devices."luks-d27fc6c5-7edd-4c18-ab70-3ca02a28abcc".device = "/dev/disk/by-uuid/d27fc6c5-7edd-4c18-ab70-3ca02a28abcc";
 

hosts/puter/packages.nix

@@ -2,8 +2,7 @@
   config,
   pkgs,
   ...
-}:
-{
+}: {
   nixpkgs.config.permittedInsecurePackages = [
     "qtwebengine-5.15.19"
     "electron-36.9.5"

modules/common/rustnet.nix

@@ -1,5 +1,4 @@
 {pkgs ? import <nixpkgs> {}}:
-
 pkgs.stdenv.mkDerivation rec {
   pname = "rustnet";
   version = "0.18.0";

modules/common/yggdrasil.nix

@@ -1,5 +1,4 @@
-{ pkgs, ... }:
-{
+{pkgs, ...}: {
   services.yggdrasil = {
     enable = true;
     persistentKeys = false;

modules/userapps/utils.nix

@@ -2,11 +2,9 @@
   config,
   pkgs,
   ...
-}:
-let
+}: let
   rustnet = pkgs.callPackage ../../modules/common/rustnet.nix {};
-in
-{
+in {
   programs.neovim = {defaultEditor = true;};
   environment.systemPackages = with pkgs; [
     parallel-disk-usage