nixos-install fails with "experimental Nix feature is disabled"

[nolight132]

Hi, I am new to NixOS. I was able to follow the instructions until nixos-install command.

Here's the output:

copying channel...
building the configuration in /mnt/etc/nixos/configuration.nix...
error: experimental Nix feature 'flakes' is disabled; use '--extra-experimental-features flakes' to override

Passing the option to the aforementioned command gave no result. I have also tried setting it in the nix.settings in my configuration.nix, still nothing.

Thanks in advance!

[Thomas]

Please try --option extra-experimental-features flakes instead.

[nolight132]

That did the trick, thank you.

I am wondering, my configuration doesn't seem to be unusual in any way, is it the default way of installing NixOS?

[Thomas]

I think there’s a bug causing this message. I noticed it when testing but thought it was something I had done to my system. I’m going to keep this issue open until it’s fixed.

[Thomas]

Added a workaround for now.