New release preparation

[K900]

This should hopefully unblock us, finally.

[nzbr]

Why does it create a shell script instead of a tarball? Can't we just run whatever that script does inside a derivation?

[K900]

No, we need to run the script as root and not in the sandbox so we can do chroot stuff.

[SuperSandro2000]

I didn't test this in depth but big thanks for tackling this.

[nzbr]

Just tested the builder locally (with nix run github:...) and it seems to work flawless

[terlar]

Thank you for a lot of fixes and finally having installer-free environment. It is a bit unfortunate that one have to use sudo/root, but I guess that is the case if chroot is needed...

One regression I discovered is the inability to configure the stuff that ends up in /etc/nixos/.... Having the ability to place custom code there allows for packing a tarball with much nicer experience.

Now the out of the box experience is:

       error: file 'nixos-wsl/modules' was not found in the Nix search path (add it using $NIX_PATH or -I)

       at «none»:0: (source not available)

[user@wsl:~]$ sudo nixos-rebuild -I nixos-config=/etc/nixos/configuration.nix switch

I find it nice for the user to be able to iterate on a base and so in my own packaging of the tarball I bundled at flake that pulls in the appropriate nixos-wsl module etc.

Where should such config live? I can make a PR to re-introduce this feature.

[K900]

That error isn't about custom code, it's just about channels not being included in the tarball. We can probably run nix-channel --update at tarball build time. As for custom config, maybe we should just have an option for adding arbitrary files to the tarball...