fix(common): guard the WORKDIR environment var

This avoids the unwanted removal of the folder if someone has already
pre-defined the variable.

Fixes #219

Suggested-by: Levente Polyak <anthraxx@archlinux.org>
Signed-off-by: Christian Heusel <christian@heusel.eu>

0 files changed, 0 insertions, 0 deletions