Hi,

When removing /usr/src/python the current working directory is also the directory being removed. This causes subsequent commands to complain about not being able to locate the current working directory.

As a potential fix, changing the current working directory to / would prevent these warnings :

&& make install \
&& cd / \
&& rm -rf /usr/src/python \

I guess this is mostly a cosmetic change but I'm not sure if the warnings could cause problems with the commands after.