Hi Marius,

On Sat,  6 Oct 2018 15:16:38 +0200
Marius Bakke <mbakke@fastmail.com> wrote:

> * gnu/packages/cmake.scm (cmake)[arguments]: Try both CPATH and C_INCLUDE_PATH
> instead of just the latter.

Hmm...  why?

I thought if one used CPATH it would not treat the headers as a system
headers and one would get a lot of errors anyway (because #include_next
wouldn't work and also because of things one "ought" not to do which
the system headers do anyway and get a pass on).