Traceback (most recent call last):
  File "/mnt/g/Maths/sage-9.5/clone/build/bin/sage-download-file", line 27, in <module>
    from sage_bootstrap.download.cmdline import run_safe
  File "/mnt/g/Maths/sage-9.5/clone/build/bin/../sage_bootstrap/download/__init__.py", line 7, in <module>
    from sage_bootstrap.download.transfer import Download
  File "/mnt/g/Maths/sage-9.5/clone/build/bin/../sage_bootstrap/download/transfer.py", line 23, in <module>
    from sage_bootstrap.compat import urllib
ImportError: cannot import name 'urllib' from 'sage_bootstrap.compat' (unknown location)
************************************************************************
Error downloading arb-2.19.0.tar.gz
************************************************************************
Please email sage-devel (http://groups.google.com/group/sage-devel)
explaining the problem and including the log files
  /mnt/g/Maths/sage-9.5/clone/logs/pkgs/arb-2.19.0.p0.log
and
  /mnt/g/Maths/sage-9.5/clone/config.log
Describe your computer, operating system, etc.
************************************************************************
