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lix/src/nix/shell.md
thenbe 5473e10249
fix: nix shell multiple commands example (#8950) 
The `-c` flag belongs to `sh` not `nix shell`. As it stands, the command errors with:

```
$ nix shell nixpkgs#gnumake --command sh --command "cd src && make"
sh: --command: invalid option
```

https://github.com/NixOS/nix/pull/8276 was good for readability, but it missed this since that PR used a find/replace script.
2023-09-07 22:25:32 +00:00

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Examples

  • Start a shell providing youtube-dl from the nixpkgs flake:

    # nix shell nixpkgs#youtube-dl
# youtube-dl --version
2020.11.01.1

  • Start a shell providing GNU Hello from NixOS 20.03:

    # nix shell nixpkgs/nixos-20.03#hello

  • Run GNU Hello:

    # nix shell nixpkgs#hello --command hello --greeting 'Hi everybody!'
Hi everybody!

  • Run multiple commands in a shell environment:

    # nix shell nixpkgs#gnumake --command sh -c "cd src && make"

  • Run GNU Hello in a chroot store:

    # nix shell --store ~/my-nix nixpkgs#hello --command hello

  • Start a shell providing GNU Hello in a chroot store:

    # nix shell --store ~/my-nix nixpkgs#hello nixpkgs#bashInteractive --command bash

    Note that it's necessary to specify bash explicitly because your default shell (e.g. /bin/bash) generally will not exist in the chroot.

Description

nix shell runs a command in an environment in which the $PATH variable provides the specified installables. If no command is specified, it starts the default shell of your user account specified by $SHELL.

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