Apropos
By default as of NixOS 21.05, apropos
, whatis
and man -k
do not find anything when run, because the man page index cache is not generated.
To generate it manually (and again to update it when new software is installed), run:
sudo mkdir -p /var/cache/man/nixos
sudo mandb
To enable automatically building the immutable cache, you can set:
documentation.man.generateCaches = true;
Note that this will rebuild the cache every time you change anything in environment.systemPackages
, and will make the mandb
command fail.