Trouble getting started with nix flakes?

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1

I’m trying to follow the docs at Flakes - NixOS Wiki

Tried permanently enabling flakes by adding:

nix.settings.experimental-features = [ "nix-command" "flakes" ];

in /etc/nixos/configuration.nix .

Restarted afterwards (this is in a VM btw).

More context in the config file:

nix.settings.experimental-features = [ "nix-command" "flakes" ];

Yet, when I run nix flake init (or sudo nix flake init):

error: experimental Nix feature 'nix-command' is disabled; use '--extra-experimental-features nix-command' to override

Edit: Got it to work! I still would like to know how to make it work permanently (suspect I may just need to specify extra in the config), but it’s working for one offs with:

nix --extra-experimental-features 'nix-command flakes' run github:Name/Subname

2

You probably just need to rebuild the configuration with e.g. nixos-rebuild switch, but it depends a bit on whether your VM keeps around state.

3

That did it, thanks!