nix/README.md

NixOS Configuration Repository

NOTE: These configs expect this repo to be cloned to /etc/nixos/git/

# First run as root:
git clone https://git.sysctl.io/albert/nix /etc/nixos/git
ln -s /etc/nixos/git/flake.nix /etc/nixos/flake.nix
nixos-rebuild switch --flake '/etc/nixos#<HOSTNAME>'
mkdir /nix/var/nix/profiles/per-user/<USERNAME>

# as <USERNAME>:
home-manager switch -b backup --flake /etc/nixos/git

To Do List

• Set up IP forwarding via sysctl
  • Sep 15 14:48:33 nixos-rpi4-01 tailscaled-autoconnect-start[103336]: Warning: IP forwarding is disabled, subnet routing/exit nodes will not work.
• Look into Remote Builds - Link
• Raspberry Pi 1:
  • Set up Tailscale with pre-auth keys (services.tailscale.authKeyFile, add the key to secrets/secrets.yaml)
    • ${hostname}-tailscale-key
  • Set up sops and gpg
• Configure GameMode / Gamescope
• Find a way to remove all default search engines in Firefox (Google, Amazon, etc)
• Figure out what the home-manager account options are for.
• Figure out how to get GPG SSH auth working
• Security hardening
• cronjob
  • Change wallpaper at a certain time of day
• emacs
  • Add bracket auto-completion
  • Find a way to have magit save login credentials
• Try disko - Link
• btrfs snapshots
• vscodium and user-config.js file?
• rofi - bitwarden-cli / bitwarden-menu (Link)

Completed ToDo List here

Configs

Hostname	Description	Status
nixos-laptop	Lenovo P1 Gen 5	Complete
nixos-framework	Ryzen 7 Framework 13	Awaiting Hardware
nixos-rpi4-01	Testing Raspberry Pi / ARM	In Work

---

Information

Home Manager

• Home Manager Documentation - Link
• Home Manager Options Search - Link

NixOS

• NixOS Documentation - Stable - Link
• NixOS Packages / Options Search - Link
• Nix User Repository (NUR) Search - Link

Useful Links

• FlakeHub - Link
• Track a Nixpkgs PR - Link
• Awesome-Hyprland - Link

Examples

• Tons of good examples here - Link
• NixOS Flakes Intro Guide - Link

Theming

• Neofetch Themes - Link
• gruvbox-factory - Link
• Hyprland Gruvboxy - Link

---

Theming

• To change system-wide themes, you need to change the following:

• Current themes:

1. gruvbox
2. synthwave

Desktops

gnome

1. nixos/common/desktops/gnome/default.nix - Change the imports at the bottom.
2. home-manager/hosts/$HOSTNAME/desktops/gnome-conf.nix - Change the variables at the top.

hyprland

1. home-manager/hosts/$HOSTNAME/desktops/hyprland/$THEME/hyprland-conf.nix - Change the WALLPAPER_DIR variable in ".config/hypr/start.sh".text
2. home-manager/hosts/$HOSTNAME/desktops/hyprland/$THEME/hyprland-conf.nix - Change col.active_border and col.inactive_border in the general section.
3. home-manager/bash.nix - Update the sessionVariable variable GTK_THEME

Software

waybar

1. home-manager/hosts/$HOSTNAME/desktops/hyprland/$THEME/waybar-conf.nix - Update all relevant colors. Possibly make configs for colorschemes and import them.

swaylock

1. home-manager/hosts/$HOSTNAME/desktops/hyprland/$THEME/swaylock-conf.nix - Update all relevant colors. Possibly make configs for colorschemes and import them.

kitty

1. home-manager/common/software/cli/kitty.nix - Update the content of home.file.".config/kitty/theme.conf".text

Firefox

1. home-manager/common/software/gui/firefox.nix - Change the entry under "# Theming"

btop

1. home-manager/common/software/cli/btop.nix - Set color_theme

bash / powerline

1. home-manager/common/software/cli/bash.nix - Set theme in programs.powerline-go.settings

neofetch

1. home-manager/common/software/cli/neofetch.nix - Update the contents of home.file.".config/neofetch/config.conf".text

wlogout

1. home-manager/hosts/$HOSTNAME/desktops/hyprland/$THEME/wlogout.nix - Update the style.css section

Text Editors

emacs

1. home-manager/common/software/cli/doom-emacs.d/packages.el - Include your theme here, if needed
2. home-manager/common/software/cli/doom-emacs.d/config.el - Set your theme here (setq doom-theme '$THEME_NAME)

neovim

1. Theming done within vim itself <SPC> t h

---

GPG Keys

1. Import the user private key: gpg --import gpg/users/albert/privkey.asc
2. Mark it as trusted: gpg --edit-key albert@sysctl.io, then type trust, then 5
3. On each new machine, run sudo nix-shell -p ssh-to-pgp --run "ssh-to-pgp -i /etc/ssh/ssh_host_rsa_key -o /etc/nixos/git/keys/hosts/$(hostname).asc"
   • This will output the identifier you add to .sops.yaml
   • Move HOSTNAME.asc to keys/hosts/ and upload to git and rename accordingly.

Secrets

1. To edit a file: cd to /path/to/nix-files/ and run:
   • nix-shell -p sops --run "sops secrets/secret_file.yml"
   • New shell alias: sops secrets/secret_file.yml
2. When you add a new machine, you must update the secrets files encryption.
   • Run sops-update secrets/secrets.yaml and commit the change.

Lanzaboote / SecureBoot

• Instructions here - Link

1. Create your keys: sbctl create-keys
2. Verify your machine is ready for SecureBoot: sbctl verify - Everything except *-bzImage.efi are signed
3. Enter Secureboot Setup mode in your EFI Settings on the motherboard (F10)
   • Security -> SecureBoot -> Set to Enabled and "Reset to Setup Mode" and exit
4. Enroll the keys: sbctl enroll-keys --microsoft
   • If you wish, you can select --tpm-eventlog, but checksums will change later (ie, at a kernel rebuild)
5. Reboot and verify you are activated: bootctl status

Other

• Waybar inspirations
  • https://github.com/Pipshag/dotfiles_nord
  • https://github.com/hajosattila/dotfiles/
  • https://gist.github.com/toger5/3a509d9a9d7ebba1e02205b00449ccff