Over half the blogpost is the user describing how they were able to get nix set up on a machine they don't have admin permissions to, and had a 4 GiB disk quota

Over half the blogpost is the user describing how they were able to get nix set up on a machine they don't have admin permissions to, and had a 4 GiB disk quota limit. Those constraints don't really apply if you have admin control of your machine. (And the troubles in the first half were caused by zealously diving deeper with Nix, after an initial simple setup went well).