My NixOS Configuration

My personal NixOS setup, fully declarative and leveraging the power of Nix for custom packages and configurations.

---

🔧 The Wrapper Pattern

All my packages use symlinkJoin + wrapProgram to inject configuration using only nix (no home-manager!):

# pkgs/ghostty/default.nix
pkgs.symlinkJoin {
  name = "ghostty-wrapped";
  paths = [ pkgs.ghostty ];
  nativeBuildInputs = [ pkgs.makeWrapper ];
  postBuild = ''
    wrapProgram $out/bin/ghostty \
      --add-flags "--config-file=${./config}"
  '';
}

---

🩹 Mergiraf Patch System

Applying multiple community patches to dwl usually causes conflicts. apply-patches.nix solves this:

# lib/apply-patches.nix (simplified)
pkgs.stdenvNoCC.mkDerivation {
  patchPhase = ''
    git init
    git config merge.mergiraf.driver "mergiraf merge --git %O %A %B ..."

    for p in "''${PATCHES[@]}"; do
      git am --3way "$p" || {
        # Apply fixups for manual conflict resolution
        for f in "''${FIXUPS[@]}"; do
          git apply "$f" || true
        done
        git am --continue
      }
    done
  '';
}

How it works:

• Uses mergiraf for intelligent 3-way merging
• Falls back to fixup patches when needed
• Result: clean patch stacking that "just works"

# pkgs/dwl/default.nix
dwlSrc = applyPatches {
  src = pkgs.fetchgit { url = "https://codeberg.org/dwl/dwl.git"; /* ... */ };
  patches = [
    (pkgs.fetchurl { url = "...movestack.patch"; })
    (pkgs.fetchurl { url = "...bar.patch"; })
  ];
};

---

📝 Neovim with nixCats

A nixCats config running Neovim nightly:

# pkgs/nvim/default.nix (highlights)
lspsAndRuntimeDeps = {
  general = [
    lua-language-server
    nil  # Nix LSP
    stylua
    ripgrep fd
    customPkgs.tidal-language-server  # Haskell Music LSP packaged by me :)
  ];
};

startupPlugins = {
  general = [
    blink-cmp oil-nvim
    flash-nvim harpoon2
    nvim-treesitter.withAllGrammars
    # ... 40+ more
  ];
};

settings = {
  neovim-unwrapped = neovim-nightly-overlay.packages.${system}.neovim;
};

---

🚀 Quick Start

# Load my NixOS configuration
sudo nixos-rebuild switch --flake github:gavbog/nix#<hostname> # Options: mac

# Try individual packages
nix run github:gavbog/nix#nvim
nix run github:gavbog/nix#ghostty
nix build github:gavbog/nix#dwl

---

💻 Systems

Hostname	Description
mac	Apple Silicon (Asahi)

Each system has its own configuration defined under systems/:

systems/
└── mac/                 # Apple Silicon setup

---

📁 Structure

.
├── flake.nix
├── pkgs/
│   ├── dwl/           # Patched Wayland compositor
│   ├── nvim/          # nixCats Neovim config
│   ├── ghostty/       # Terminal wrapper
│   ├── zsh/           # Shell with Starship + Zinit
│   ├── librewolf/     # Browser
│   └── ...
├── lib/
│   └── apply-patches.nix  # Mergiraf patch utility
├── modules/           # NixOS modules (audio, bluetooth, etc.)
└── systems/           # Host-specific configurations

---

Built with ❄️ Nix