# FAQ

Frequently asked questions:

- Installation stops with an error: source/str_util.c:25:20: fatal error: Python.h: No such file or directory

    You do not have the Python development headers installed, on Debian based Distributions you can install them via aptitude install python-dev.

- unknown key “default_command”

    This key was deprecated by f8d9135. See https://github.com/pimutils/khal/issues/648 for the rationale behind this removal.