`pip3 not found` when building box

[smarbal]

The following error occurs when building the box on the latest Dockerfile :

Step 51/62 : RUN pip3 -qq install --user --no-warn-script-location /tmp/lib/  && rm -rf /tmp/lib
 ---> Running in cc63eb0b2ef6
/bin/sh: 1: pip3: not found
The command '/bin/sh -c pip3 -qq install --user --no-warn-script-location /tmp/lib/  && rm -rf /tmp/lib' returned a non-zero code: 127

[Alex]

@smarbal Does it happen systematically ? Did you try to rebuild ?

[smarbal]

Rebuilding with the --no-cache flag solved the problem.