fish and zsh support for the nix shell and nix-shell environments of the Nix package manager.

Features:

• When entering a nix shell or nix-shell environment, the shell stays the same.
• Inside those environments, your prompt prints the loaded packages to the right.
• Alternatively, print that information by executing: nix-shell-info
• nix-shell --command or the like still execute inside bash, such that scripts don't break.

any-nix-shell can currently be installed from the official nixos-unstable channel (Link 1, Link 2). If you don't know how to do that, you can alternatively execute

nix-env -i any-nix-shell -f https://github.com/NixOS/nixpkgs/archive/master.tar.gz

which installs any-nix-shell into your user environment.

In the following we describe how to enable the any-nix-shell plugin for your user. This differs slightly between fish and zsh.

Add the following to your ~/.config/fish/config.fish. Create it if it doesn't exist.

any-nix-shell fish --info-right | source

Add the following to your ~/.zshrc. Create it if it doesn't exist.

any-nix-shell zsh --info-right | source /dev/stdin

Alternatively the any-nix-shell plugin can be enabled system-wide. This enables it for every user. To do so, add the following to your configuration (/etc/nixos/configuration.nix).

  programs.fish.enable = true;
  programs.fish.promptInit = ''
    any-nix-shell fish --info-right | source
  '';

  programs.zsh.enable = true;
  programs.zsh.promptInit = ''
    any-nix-shell zsh --info-right | source /dev/stdin
  '';

  programs.zsh.enable = true;
  programs.zsh.initExtra = ''
    any-nix-shell zsh --info-right | source /dev/stdin
  '';

The any-nix-shell command (which is used for enabling the plugin in a specific shell) optionally takes any of the following flags: