- _FORTFIY_SOURCE should not be redefined! Investigate why it is redefined and
  if possible adjust it in order to avoid a lot of noise in the build output.
- Probably more dependencies are needed (despite it seems it run fine):
   lua-bitopt, lua-busted
 (According: <https://packages.debian.org/sid/source/neovim>, via:
  <https://github.com/neovim/neovim/wiki/Building-Neovim#build-prerequisites>)
