Nix

Nix package manager and Home Manager configuration.

Files

File	Purpose
home.nix	Home Manager config — packages, dotfile links, bash and git setup
config.nix	Legacy Nix channel package list (~/.config/nixpkgs/config.nix)
nrl.nix	Work machine override (NRL) — sets work git email and hooks path
null.nix	Empty override imported on all non-NRL machines

How it works

home.nix is the main entry point for Home Manager. It manages packages, environment variables, dotfile symlinks, bash config, and git config declaratively. At the bottom it conditionally imports a host-specific override based on /etc/hostname:

imports = if host == "NRL-5CG1380ZN7"
  then [ ./nix/nrl.nix ]
  else [ ./nix/null.nix ];

config.nix is the older Nix channel approach (nix-env -iA nixpkgs.myPackages) — predates the Home Manager setup. Now superseded by home.packages in home.nix.

Status

These files are not actively used — dotfile management has moved to setup.ps1 / setup.sh. The config is kept as a reference and starting point if Nix Home Manager is adopted again.

Stale paths

home.nix references file paths from the old flat repo layout. If reactivating, these all need updating to the current per-tool directory structure:

Old path	Current location
./curlrc	../curl/curlrc
./inputrc	../bash/inputrc
./ripgreprc	../ripgrep/ripgreprc
./tigrc	../tig/tigrc
./tigrc.vim	../tig/tigrc.vim
./tmux.conf	../tmux/tmux.conf
./vimrc	../vim/vimrc
./bashrc	../bash/bashrc
./bash/bash_aliases	../bash/bash_aliases
./profile	../bash/profile
./pwsh_profile.ps1	../powershell/Microsoft.PowerShell_profile.<HOSTNAME>.ps1
./config/direnv/direnv.toml	../config/direnv/direnv.toml
./gitignore	../git/gitignore

home.stateVersion = "22.11" — set when this config was created; update to the current Home Manager release when reactivating.

Not wired into the setup scripts.

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Source: nix/README.md in the dotfiles repo.