[Mailman-Users] make install error

I have installed the prerequisites properly and I checked ... working...

What this error shows?

#make install Compiling /home/mailman//Mailman/pythonlib/tempfile.py ... Compiling /home/mailman//Mailman/versions.py ... Traceback (innermost last): File "bin/update", line 32, in ? from Mailman import MailList File "/home/mailman/Mailman/MailList.py", line 41, in ? from Mailman.ListAdmin import ListAdmin File "/home/mailman/Mailman/ListAdmin.py", line 33, in ? from Mailman import Message File "/home/mailman/Mailman/Message.py", line 30, in ? import sha ImportError: No module named sha

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