Unrecognised flag '--extra-experimental-features'

Technical Discussion Getting Started
#1

Hi Team,
Trying to install Holochain on my Macbook, but having an issue at the very step described here : Get Started Developing with Holochain
See the error message I got

========================
hubject@MacBook-Pro-de-Bernard ~ % bash <(curl https://holochain.github.io/holochain/setup.sh)
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1605 100 1605 0 0 9303 0 --:–:-- --:–:-- --:–:-- 9668
Setting up binary cache for all users (requires root access)
sudo --preserve-env=NIX_CONFIG,PATH /Users/hubject/.nix-profile/bin/nix run nixpkgs/nixos-22.11#cachix --extra-experimental-features nix-command flakes – use holochain-ci -m root-nixconf
Password:
error: unrecognised flag ‘–extra-experimental-features’
Try ‘/Users/hubject/.nix-profile/bin/nix --help’ for more information.

#2

hey, my guess is that you’ve got nix version installed that predates the --extra-experimental-features (and flakes for that matter), so something <2.4. please verify that with nix --version, and if so manually upgrade to a newer version. updating nix is documented upstream.

#3

Hi Steeve,
I go this :

hubject@MacBook-Pro-de-Bernard ~ % nix --version
nix (Nix) 2.3.10

Then making the update, and got this

hubject@MacBook-Pro-de-Bernard ~ % nix --version
nix (Nix) 2.13.3

#4

nice, that worked! now you’re ready to going through the developer docs you mentioned above, and let us know if it works this time

#5

Yep, it works well now …
Thanks again !

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