NixOS is more complicated than you think but opencode fixed it

Luigi 20 Jul 2026 • 2 min read

OverviewA deep dive into an advanced, minimal NixOS setup using LabWC (Wayland compositor) + Noctalia Shell V5 (from Cachix, not the official NixOS repo), assisted by opencode with the DeepSeek V4 Flash model for AI-guided configuration.The result? A desktop that boots at 743 MB RAM with only 48 active tasks.Key Highlights🔹 Ultra-lightweight743 MB RAM usage on boot48 tasks active — no bloat from full DEs like GNOME or KDE🔹 LabWC + Noctalia V5LabWC provides a minimal Wayland session; many desktop services (dbus, polkit, clipman, etc.) must be manually configuredNoctalia Shell V5 sourced via Cachix (not yet in nixpkgs)Color schemes sync between Nocttalia and LabWC via noctalia-labwc-sync🔹 AI-Assisted Configopencode + DeepSeek V4 Flash used to write and debug NixOS configsAGENTS.md drives system updates and automationSudoers configured for passwordless sudo (opencode convenience)🔹 Custom PatchesSnapshot (webcam app) patched to work on NixOS — needed a custom build with a library fix, despite being in nixpkgsSeveral environment variables manually set (session type, compose key, Telegram fix) since LabWC/greetd

don't handle them all🔹 No Home-ManagerUser configs kept in ~/.config/ for portability across distrosA rebuild hook symlinks dotfiles into /etc/nixos/ (like GNU Stow)🔹 Hybrid Package ManagementNix packages via environment.systemPackagesnpm-installed apps like opencode2 coexist alongside Nix-managed onesSome programs (e.g., OBS Studio) enabled via programs.obs-studio.enable rather than packages listNotable Services & Tools

Service/Tool Purpose

greetd Login manager (alternative to GDM/SDDM)

vox-type (Vulkan) Speech-to-text, Italian primary

podman + podman-compose Container management

cockpit + cockpit-podman Web admin UI

kshi Display resolution & multi-monitor

clipman Persistent clipboard

satty Screenshots

scrcpy Android screen mirror via USB

smartmontools SSD health analysis

LocalSend LAN file sharing (port 53317)

KDE Connect Device integration

Traefik Reverse proxy (podman container)

NixOS Config Structure/etc/nixos/ ├── flake.nix → loads configuration.nix + Nocttalia V5 ├── configuration.nix → main config (long, modular) ├── hardware-configuration.nix └── *symlinks → ~/dotfiles/ (managed via rebuild hook) Lessons & GotchasLabWC is not a full DE — you must manually wire up dbus, polkit, clipboard, environment variables, etc.greetd doesn't fully manage session env vars — some must be hardcoded in configSnapshot needs a patch on NixOS even if available in reposNix sometimes misidentifies apps — file associations can be tricky4 GB+ RAM recommended for nixos-rebuild — a swap file helps on low-RAM machinesAMD microcode + Bluetooth disabled at boot (but installed) — fine-grained controlFinal Thought"Some configurations are very complicated — but it is worth exploring this path."The trade-off is clear: more complexity upfront for a lean, reproducible, extremely lightweight system. opencode + AI bridging the gap makes it practical.