flabrosse

I have something very similar to that, also coming from the same source ;-). I have also added ros specific python packages with the same constraint. Yes, I do agree...

Here you go: ``` ~/catkin_ws $ catkin_make Base path: /home/ffl/catkin_ws Source space: /home/ffl/catkin_ws/src Build space: /home/ffl/catkin_ws/build Devel space: /home/ffl/catkin_ws/devel Install space: /home/ffl/catkin_ws/install #### #### Running command: "make cmake_check_build_system" in "/home/ffl/catkin_ws/build"...

@awesomebytes this is a good pointer! I don't have a PYTHON_PACKAGE_PATH env var, but do have a PYTHONPATH, that contains python3.5 directories. This is set by _setup_util.py: in my devel...

catkin and catkin_pkg are installed with only 2.7 support: ``` $ eix -I catkin [I] dev-python/catkin_pkg Available versions: (~)0.4.6[1] ~0.4.7 ~0.4.8 ~0.4.9 **9999 {test PYTHON_TARGETS="pypy pypy3 python2_7 python3_4 python3_5 python3_6"}...

BTW, I do appreciate all these suggestions! Thanks for helping!

I'm pretty sure I had the last version of catkin_pkg at some point and went back to that one because the more recent ones are not in the overlay so...

> > Installed versions: 0.4.6[1](14:47:09 19/12/18)(PYTHON_TARGETS="python2_7 -python3_4 -python3_5") > > Re-emerge your `catkin_pkg`. It is out of date. This is because the `setup.py` for `catkin_pkg` lists `argparse` as a module...

Solved! Following thread #99 I looked at the patches each of the packages use. catkin_pkg-0.4.9 does **not** use the argparse patch. catkin_pkg-0.4.8 does. I down-graded to that and it now...

And now the only two versions available of catkin_pkg are 0.4.9 and 0.4.10, neither of which uses the argparse patch. Given how unreliable is the install with anything else than...

Just for info, catkin_pkg-0.4.12 seems to work.