Sorry for OT, but how? I googled and I see, I have to define or even eliminate HISTSIZE and HISTFILESIZE, but find and grep do not give me those definitions in /etc and even in /usr I cannot find something reasonable…
I tried and was as successful as I got even a warning message, that I still need to install dev-python/pip dev-python/wheel. Afterwards the script starts downloading but finally still delivers lots of Restarting script using /usr/bin/python3
Then I tried your way above with 0.9.0b2. In that one ther is no custom_pyhton() even. Hence I tried as is, but it also ends up with failures, that it cannot build gphoto2 (which I installed with emerge anyhow) and pyzmq (dito installed)…
So currently I am stuck, at least with my limited compentency (but I want RPD as I do not see real alternatives)