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I have a script that needs to be run on brand new virtual machines, but it depends on Nix being present, and I don't want to manually install it every time.

toraritte
  • 1,080

1 Answers1

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  1. Use the nixos.org installer with the --yes option.

    Examples:

    • nix.dev version:

      curl -L https://nixos.org/nix/install | sh -s -- --daemon --yes

    • nixos.org version

      sh <(curl -L https://nixos.org/nix/install) --daemon --yes

  2. Use the DeterminateSystems installer with the --no-confirm option.

    NOTE
    Not sure how to use this option with

     curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install

    but hoping to test it soon.

This script seemed to do the trick for me:

#!/usr/bin/env bash

curl -L https://nixos.org/nix/install | sh -s -- --daemon --yes


if [ -e '/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh' ]; then
  . '/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh'
fi


Testing whether Nix is available in subsequent commands


nix --version

CAVEAT

The Nix installer uses sudo so a password will still have to be entered manually. (This is not an issue for me, as I'm just trying to save time, and not fully automate the process - at least for now. There are workarounds though on how to install Nix without root permissions.)

Where are the Nix installer options documented?

They aren't documented. A pull request is forthcoming, and this NixOS Discourse thread lists all available options until then. (Also, here's a skeleton of a man page draft for the installer.)

toraritte
  • 1,080