Skip to content


Snowfall Lib automatically applies all of your modules to your systems. This means that all NixOS modules will be imported for your NixOS systems, all Darwin modules will be imported for your Darwin systems, and all Home Manager modules will be imported for your Home configurations.

To create a new module, add a new directory to your modules directory.

# Create a directory in the `modules/nixos`, `modules/darwin`, or `modules/home`
# directory for a new module.
mkdir -p ./modules/nixos/my-module

Now create the Nix file for the module at modules/nixos/my-module/default.nix.

    # Snowfall Lib provides a customized `lib` instance with access to your flake's library
    # as well as the libraries available from your flake's inputs.
    # An instance of `pkgs` with your overlays and packages applied is also available.
    # You also have access to your flake's inputs.

    # Additional metadata is provided by Snowfall Lib.
    system, # The system architecture for this host (eg. `x86_64-linux`).
    target, # The Snowfall Lib target for this system (eg. `x86_64-iso`).
    format, # A normalized name for the system target (eg. `iso`).
    virtual, # A boolean to determine whether this system is a virtual target using nixos-generators.
    systems, # An attribute map of your defined hosts.

    # All other arguments come from the module system.
    # Your configuration.

This module will be made available on your flakeā€™s nixosModules, darwinModules, or homeModules output with the same name as the directory that you created.