Author here! Actually the first time I’ve ever seen anyone (other than myself) share a post of mine.

If there are any suggestions I’m happy to update it, as noted in the post I’ve had a few people reach out with improvements over the years. It seems like this post in particular is liked the search engines.

While not a "default setting", a thing I always suggest is to avoid setting multiple substituters in your config. Instead, set trusted-substituters and trusted-public-keys, and then only set the substituters you need in the nixConfig.substituters attribute of the flake.nix of the project they are needed in (if you're not using flakes,, add a .nix.conf file to your project and export NIX_USER_CONF_FILES="${NIX_USER_CONF_FILES+$XDG_CONFIG_HOME/nix}:$PWD/.nix.conf" to your .envrc)