Docker Alpine: unable to select packages: python (no such package) while building image for ARM

RUN apk add --no-cache --virtual .gyp python3 make g++

We hit the same error and in our case explicitly targeting python3 seems to fix it. I asked on IRC, did not find out yet why python is not working anymore, but was told that python2 still provides /usr/bin/python. So maybe you actually need python2?