Make install command in documentation compatible with fish shell

[doubledup]

See the description in NixOS/nix.dev/pull/422 for more context.

[edolstra]

Shouldn't we just use

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

since that works in both shells?

[doubledup]

@edolstra That's much better, thanks! I've updated the PR and the description. I've also updated some other install commands I found, but left the release notes alone. Is it ok to update the release notes as well?

[doubledup]

@fricklerhandwerk @edolstra The nix.dev PR has been merged, but this one seems blocked on some tests that haven't run yet. Is there anything I can do to get the tests running?

[fricklerhandwerk]

I was on vacation, sorry for the delay and thanks for hanging tight. Looks good, I'll merge this.

[doubledup]

No problem at all. Thanks for all your work on Nix!

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/nix-team-report-2022-10-2023-03/27486/1

[zegelin]

This change has removed --daemon from the quick-start guide's invocation of install.sh.

I'm new to Nix/NixOS, yet it seems like a lot of common internet advice expects Nix to be installed in multi-user mode. Even various Nix wiki pages mention editing /etc/nix/nix.conf and restarting nix-daemon.service (eg: https://nixos.wiki/wiki/NixOS_on_ARM#Compiling_through_binfmt_QEMU, see the Note box for Arch Linux users).

That change also makes the paragraph following the install instructions make no sense:

On Linux, --daemon can be omitted for a single-user install.

There is no --daemon in the invocation to omit!

This change seems to have also missed the https://nixos.org/manual/nix/stable/installation/installation page, which still uses the bash <(curl -L https://nixos.org/nix/install) --daemon style invocation.