dot/nix/nixos/SUMMARY.md

NixOS Configuration - Implementation Summary

This document summarizes the NixOS configuration that was created based on the migration plan.

What Was Created

Directory Structure

nixos/
├── flake.nix                   # NixOS flake (no nix-darwin)
├── flake.lock                  # Flake lockfile (auto-generated)
├── configuration.nix           # System-level configuration
├── hardware-configuration.nix  # Hardware template (MUST be replaced)
├── home.nix                    # Home Manager integration
├── modules/                    # User-level configurations
│   ├── sh.nix                 # Shell (Zsh, Prezto, fzf, zoxide)
│   ├── tmux.nix               # Tmux (WSL paths removed)
│   ├── git.nix                # Git, Lazygit, Jujutsu
│   ├── nvim.nix               # Neovim with 40+ plugins
│   ├── dev.nix                # Dev tools (direnv, visidata)
│   └── task.nix               # Taskwarrior, Timewarrior
├── README.md                   # Installation and usage guide
├── TODO.md                     # Remaining tasks and issues
└── SUMMARY.md                  # This file

Key Changes from Original Configuration

✅ Removed

• nix-darwin input and outputs
• macOS/Darwin conditionals (lines 54-58 in sh.nix)
• WSL hard-coded paths (lines 31-32 in tmux.nix)
• Windows checks (lines 115-117 in sh.nix)

✅ Added

• System-level configuration (configuration.nix)

  • Boot loader setup (systemd-boot)
  • Networking with NetworkManager
  • User account definition
  • System timezone and locale
  • Nix flakes enabled

• Hardware configuration template (hardware-configuration.nix)

  • Placeholder for NixOS-generated config
  • Must be replaced during installation

✅ Modified

• Home Manager integration

  • Now runs as NixOS module (not standalone)
  • useGlobalPkgs enabled
  • Removed allowUnfree (handled at system level)

• Shell configuration (modules/sh.nix)

  • Removed all platform-specific conditionals
  • Clean Linux-only configuration
  • Added profileExtra for .profile sourcing

• Tmux configuration (modules/tmux.nix)

  • Commented out note keybindings (C-n, C-p)
  • Paths need to be updated for NixOS environment

• Development tools (modules/dev.nix)

  • Custom packages commented out:
    • claude-code
    • opencode
    • gemini-cli
  • TODO notes added for integration

Validation Status

✅ Flake syntax is valid ✅ Configuration evaluates successfully ✅ All module imports resolve correctly ✅ No blocking errors found

⚠️ Requires --impure flag due to NIX_LD settings

What Needs to Be Done Before Use

🔴 Critical (Must Do)

1. Replace hardware-configuration.nix

   sudo nixos-generate-config --show-hardware-config > nixos/hardware-configuration.nix
   

2. Update hostname in configuration.nix

   • Currently set to: "nixos"
   • Change to your actual hostname

3. Verify boot loader choice in configuration.nix

   • UEFI: systemd-boot (currently enabled)
   • BIOS: GRUB (commented out)

🟡 Important (Should Do)

1. Verify timezone in configuration.nix

   • Currently: "Europe/Berlin"

2. Check locale settings in configuration.nix

   • Currently: en_US.UTF-8 / de_DE.UTF-8

3. Verify nvim lua files exist at:

   • /home/pan/dev/config/dot/nvim/base.lua
   • /home/pan/dev/config/dot/nvim/keymaps.lua
   • /home/pan/dev/config/dot/nvim/plugins.lua
   • /home/pan/dev/config/dot/nvim/filetype.lua

🟢 Optional (Nice to Have)

1. Update tmux note paths in modules/tmux.nix (C-n, C-p keybindings)
2. Add custom packages (claude-code, opencode, gemini-cli)
3. Review and customize any other settings

How to Apply

Test Build (Recommended First)

cd /home/pan/dev/config/dot/nix/nixos
sudo nixos-rebuild build --flake .#nixos --impure

Apply Configuration

cd /home/pan/dev/config/dot/nix/nixos
sudo nixos-rebuild switch --flake .#nixos --impure

Update Packages

nix flake update
sudo nixos-rebuild switch --flake .#nixos --impure

Verification Checklist

After applying the configuration, verify:

• System boots successfully
• User 'pan' can login
• Zsh loads with Prezto theme
• fzf keybindings work (Ctrl+R)
• zoxide works (cd command)
• Tmux starts without errors
• Neovim opens with all plugins
• Git config shows correct user
• Lazygit and Jujutsu work
• Taskwarrior shows version 3.x
• Direnv loads .envrc files

Files Preserved

The original Home Manager configuration remains untouched:

• /home/pan/dev/config/dot/nix/flake.nix
• /home/pan/dev/config/dot/nix/common.nix
• /home/pan/dev/config/dot/nix/user/*

You can continue using the Ubuntu setup alongside this NixOS configuration.

Documentation

• README.md: Complete installation and usage guide
• TODO.md: Detailed list of remaining tasks and known issues
• SUMMARY.md: This file - quick overview and status

Support

For issues or questions:

1. Check TODO.md for known issues
2. Review README.md for troubleshooting
3. Consult NixOS manual: https://nixos.org/manual/nixos/stable/

Next Steps

1. ✅ Configuration created successfully
2. ⏳ Replace hardware-configuration.nix
3. ⏳ Update hostname and timezone
4. ⏳ Test build configuration
5. ⏳ Apply configuration
6. ⏳ Verify all components work

Good luck with your NixOS migration! 🚀