Adam Maleszka via Bug reports for GNU Guix <bug-guix@gnu.org> skriver:

> Since I moved to Guix distribution on the 1st of January (btw, good
> move), compiling cpplint@1.4.5 has always failed. More specifically,
> errors are triggered by pytest during the check phase.

Fixed in 6ff0a6d53a4f5c3faa4a4b6503dab47ea2cc2426, thanks!