BaseOS

BaseOS is a NixOS flake designed specifically for life and work at the c-base Space.

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Features

• c-base Wi-Fi:
  • c-base-crew → Members network (EAP/PEAP/MSCHAPv2), requires ISRG Root X1 certificate.
  • c-base-public → Guest network, open, no certificate needed.
• Freifunk Berlin: berlin.freifunk.net, open community Wi-Fi.
• ISRG Root X1 Certificate as a package (pkgs.byName.is.isrg-root-x1) only used for crew Wi-Fi.

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Project Structure

flake.nix
cbase-wifi.nix
pkgs/
└── by-name/
    └── is/
        └── isrg-root-x1/
            └── default.nix
README.md

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Usage as a Nix Flake

Here is a fully working example to include in your flake.nix or nixosConfigurations:

{
  description = "BaseOS flake for c-base space";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    baseos.url = "https://code.c-base.org/lucy/baseos"; 
  };

  outputs = { self, nixpkgs, baseos }: let
    system = "x86_64-linux";
    pkgs = import nixpkgs { inherit system; };
  in
  {
    nixosConfigurations.cbase-client = pkgs.lib.nixosSystem {
      inherit system;
      modules = [
        baseos.nixosModules.cbase-wifi.${system}
        {
          boot.loader.systemd-boot.enable = true;
          boot.loader.efi.canTouchEfiVariables = true;
          networking.hostName = "cbase-client";

          # Enable c-base Wi-Fi
          networking.wireless.c-base = {
            crew = true;          # Member network
            usePublic = true;     # Guest network (only if crew enabled)
            useFreifunk = true;   # Berlin Freifunk
            credentialsFile = "/run/secrets/cbase-credentials";
          };

          system.stateVersion = "24.05";
        }
      ];
    };

    devShells.${system}.default = pkgs.mkShell {
      buildInputs = with pkgs; [
        nixos-rebuild
        git
        nixpkgs-fmt
        statix
        deadnix
      ];
    };

    packages.${system}.isrg-root-x1 = baseos.packages.${system}.isrg-root-x1;
  };
}

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Wi-Fi Connection Priorities

• c-base-crew → 20
• c-base-public → 10
• berlin.freifunk.net → 5

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Development

Enter the dev shell:

nix develop

Run formatter:

nix build .#formatter

Run formatting checks:

nix build .#checks

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Certificate

Use the certificate only for the crew network:

pkgs.byName.is.isrg-root-x1

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Target Audience

BaseOS is for anyone who:

• Is a member of the c-base Space.
• Wants a reproducible NixOS environment for Wi-Fi, certificates, and dev tools.
• Wants to use the flake as a base for other c-base projects.