meshtastic package doesn't exist in nixpkgs 25.11 stable. Use optionalAttrs to skip the override when not available, allowing the flake to build against both stable and unstable.
- New NixOS host 'uConsole' for ClockworkPi CM5 portable terminal - flake.nix: add nixos-uconsole and nixos-raspberrypi inputs - Imports: nixos-uconsole.nixosModules.uconsole-cm5, nixos-raspberrypi.nixosModules.raspberry-pi-5.base - Full package list: base tools, HAM radio, SDR/RF, mesh/LoRa, security tools, GPS/maps - Reticulum stack (rns 1.2.9, lxmf 0.9.8, nomadnet 1.1.1) built from PyPI via overlays/reticulum.nix - systemd services: rnsd (Reticulum daemon), kismet (Wi-Fi IDS) - Kernel modules for SDR (rtl-sdr, dvb) and USB WiFi - Follows existing host config conventions (cyt-pi as template)
