Something seems to have change between 0.6.0 and 0.6.1

+ ./make.py fr -b -d -js
Python: 3.5.4 (default, Oct  9 2017, 12:07:29)
[GCC 6.4.1 20170727 (Red Hat 6.4.1-1)]
# Error. Couldn’t import file build_data.py in folder gc_lang/fr
...

BTW, this error exists in previous version and was not a blocker


+ ./make.py fr -t
Python: 3.5.4 (default, Oct  9 2017, 12:07:29)
[GCC 6.4.1 20170727 (Red Hat 6.4.1-1)]
============== MAKE GRAMMALECTE [fr] at 13 h 15 min 43 s ==============
...
> Running tests
# Error. Couldn't import file fr_test.py in folder tests
+ exit 0

Diffing the generated content
removed
removed
added
added
removed
added
removed
removed
removed
removed
removed
removed
removed
removed
removed


And... it doesn't work anymore.