This oh-my-zsh plugin lets you use zsh as the default shell in a nix-shell environment. It's recommended to use this in conjunction with nix-zsh-completions.

In theory all you need to do to use zsh in nix-shell is to set NIX_BUILD_SHELL to zsh. Unfortunatly nix assumes that the NIX_BUILD_SHELL is a bash variant and passes bash specific arguments to the shell. To fix this we need a shim that translates these arguments.

The information that nix-shell exposes to the environment is also pretty sparse. It would be nice to know what derivations are included in the current environment for example to display them in the shells prompt.

git clone [email protected]:chisui/zsh-nix-shell.git $ZSH_CUSTOM/plugins/nix-shell

Then add nix-shell to the plugins list in ~/.zshrc.

Clone this repository and add the following to your ~/.zshrc.

source /path/to/zsh-nix-shell/nix-shell.plugin.zsh

It should be possible to install this plugin through most zsh plugin managers. If the one of your choice is not supported feel free to open an issue or even better create a pull request.

Use nix-shell as you did before.

If you use the --run or --command argument to execute something inside the nix-shell and then return it will still be run using bash. In the case of --command the interactive shell will still be zsh.

If you use the --pure flag the resulting shell will be the default shell.

If you are inside a nix-shell environment IN_NIX_SHELL will be set. The value will be impure or pure if you specified --pure.

The packages argument is passed through as NIX_SHELL_PACKAGES to the shell.

If this Variable is empty nix-shell was called for a specific nix expression which is stored in the name environment variable.

These variables can now be used inside a theme to customize the prompt. Take a look at this variant of the agnoster theme for an example of how this might look.

Please do. Pull requests welcome.