NixOS Configuration

My personal NixOS flake supporting multi-host, multi-user, multi-DE. Each host loading the modules it needs.

It is licenced under MIT so feel free to modify, use and share.

[NOTE] If you plan on using it, be careful of removing my ssh keys, autoupdates from this repository...

Design

The flake uses mkHost helper that reads hosts/<host>/users.nix to setup the user config and DE if needed. it import only the strict necessary modules / configs.

Each user's config is split into three layers:

Layer	Path	What goes here
shell	users/<user>/home.nix	Shell, git, anything usable headless
DE common	home/common.nix + modules/desktop/common.nix	Common apps for all desktop users
DE custom	users/<user>/desktop/<de>.nix	User's own DE settings and theming

Repository Structure

NixOS/
├── flake.nix                         # mkHost helper + nixosConfigurations outputs
├── configuration.nix                 # shared system config
│
├── hosts/
│   └── laptop_01/
│       ├── default.nix               # host-specific hardware + services
│       ├── hardware-configuration.nix
│       ├── users.nix                 # where to add the users of a host
│       └── modules/
│           └── gpu-env.nix           # NVIDIA Prime env vars + CUDA btop
│
├── modules/
│   ├── users.nix                     # defines users option
│   └── desktop/
│       ├── sddm.nix                  # display manager, loaded if desktop is present
│       ├── common.nix                # common config for all DE users
│       ├── hyprland-noctalia/
│       │   ├── system.nix            # hyprland programs
│       │   └── home.nix              # UWSM env, Hyprland config, Noctalia
│       ├── kde/
│       │   ├── system.nix            # kde programs
│       │   └── home.nix            
│       └── programs/
│           ├── firefox-system.nix    # programs specific configs
│           └── firefox-home.nix    
│
├── home/
│   └── common.nix                    # headless only fish, starship, btop
│
└── users/
    ├── charon/
    │   ├── system.nix                # NixOS user declaration
    │   ├── home.nix                  # minimal home (username, stateVersion)
    │   └── desktop/
    │       ├── default.nix           # DE layer: personal packages
    │       ├── firefox.nix           
    │       └── hyprland-noctalia.nix # DE specific configuration
    └── peppa/
        ├── system.nix                # minimal configuration for a user
        └── home.nix

Adding a host :

1. Create hosts// with default.nix, hardware-configuration.nix and users.nix
2. Add nixosConfigurations. = mkHost ""; to flake.nix

Adding a user :

1. Create users//system.nix and users//home.nix
2. Add the user to hosts//users.nix with their desktop (or null for headless)
3. Optionally add users//desktop/default.nix for GUI-only config and users//desktop/.nix for DE-specific config

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Willing to contact me :