Failed to start nix-daemon.socket: Unit var.mount not found.

[mcdent]

Trying to run your script on Fedora 38. Ok I realise its not Silverblue and is beta, but wanted to try nix :)

Running the script gives me an error near the start like:-

 A unit's purpose may be to act as a helper for some other unit which has
  a requirement dependency on it.
• A unit may be started when needed via activation (socket, path, timer,
  D-Bus, udev, scripted systemctl call, ...).
• In case of template units, the unit is meant to be enabled with some
  instance name specified.
Failed to start nix.mount: Unit var.mount not found.
restorecon: lstat(/nix) failed: No such file or directory
Temorarly setting SELinux to permissive
Prepareing the nix install script
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  4052  100  4052    0     0   2584      0  0:00:01  0:00:01 --:--:--  2584
downloading Nix 2.15.0 binary tarball for x86_64-linux from 'https://releases.nixos.org/nix/nix-2.15.0/nix-2.15.0-x86_64-linux.tar.xz' to '/tmp/nix-binary-tarball-unpack.6nXZEVaOwm'...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 21.0M  100 21.0M    0     0  1662k      0  0:00:12  0:00:12 --:--:-- 2511k
Note: a multi-user installation is possible. See https://nixos.org/manual/nix/stable/installation/installing-binary.html#multi-user-installation
Switching to the Multi-user Installer
Welcome to the Multi-User Nix Installation

This installation tool will set up your computer with the Nix package
manager. This will happen in a few stages:

1. Make sure your computer doesn't already have Nix. If it does, I
   will show you instructions on how to clean up your old install.

Then everything seems to go swimmingly until near the end when:-

---- sudo execution ------------------------------------------------------------
I am executing:

    $ sudo systemctl start nix-daemon.socket

to start the nix-daemon.socket

Failed to start nix-daemon.socket: Unit var.mount not found.

---- oh no! --------------------------------------------------------------------
Oh no, something went wrong. If you can take all the output and open
an issue, we'd love to fix the problem so nobody else has this issue.

:(

We'd love to help if you need it.

You can open an issue at
https://github.com/NixOS/nix/issues/new?labels=installer&template=installer.md

Or get in touch with the community: https://nixos.org/community
Nix installer has finnished running
Now copying service files
Removed "/etc/systemd/system/sockets.target.wants/nix-daemon.socket".
Created symlink /etc/systemd/system/sockets.target.wants/nix-daemon.socket → /etc/systemd/system/nix-daemon.socket.
Failed to start nix-daemon.socket: Unit var.mount not found.
Now setting SELinux back to Enforcing
Making a nix backup
Installing nix backup
#!/bin/bash
sudo echo "Resetting nix..."
sudo rm -rf /nix/*
sudo mkdir -p /nix
sudo cp -R /opt/nb/nix/* /nix/
sudo restorecon -RF /nix
sudo echo "Nix has been resetted. Reboot for changes to apply."
Finnished installing nix backup
Reboot your system by typing
systemctl reboot

Any clues or ideas very welcome.

[dnkmmr69420]

Are you using workstation or silverblue? If it was workstation, you would need to run the script for mutable selinux based distros.

[dnkmmr69420]

I can't replicate this bug so I am gonna close this report