Really? I searched for `filename:home.nix` (which brought me to https://github.com/search?utf8=%E2%9C%93&q=filename%3Ahome.n...). That seems site-wide to me, unless I'm misunderstanding you.

These kind of keywords really should be next to the search box with a question mark next to them or something.

TIL some of them are on this page that you only see if you search for an empty string:

https://github.com/search?q=

Click on 'prefixes'. This kind of thing should be readily available from any search box that searches through GitHub.

That's awesome. I didn't know about the keyword filename: I've been using the button to the left of "Clone or Download" this whole time. Thanks for the info!