The font used is *[Vegur](http://dotcolon.net/font/vegur/)*, a CC0 font.
The revision used is one of the harder to find revisions, either 0.601 or [0.602](https://web.archive.org/web/20120828195558/http://www.dotcolon.net:80/font/?id=vegur).
Do note that the original logo as designed has manually positioned O and S, and
a manually transformed O shape.
The manual adjustments have been faithfully re-created over the existing
de-facto version of the logo in `nixos.text.svg` if it can be useful. The main
idea behind the adjustments seems to keep the round letters narrower (letters
like O and C). The file has been built expecting the **Vegur602** font family
instead of the *Vegur* font family. Such a font family can be built using the
derivation and source files provided in the font folder.