mssql-conf setup freezes and never finishes

So I'm following the instructions for python and ubuntu, and my installation freezes at some point

diego@envy:~$ sudo /opt/mssql/bin/mssql-conf setup
Choose an edition of SQL Server:
  1) Evaluation (free, no production use rights, 180-day limit)
  2) Developer (free, no production use rights)
  3) Express (free)
  4) Web (PAID)
  5) Standard (PAID)
  6) Enterprise (PAID)
  7) Enterprise Core (PAID)
  8) I bought a license through a retail sales channel and have a product key to enter.

Details about editions can be found at
https://go.microsoft.com/fwlink/?LinkId=852748&clcid=0x409

Use of PAID editions of this software requires separate licensing through a
Microsoft Volume Licensing program.
By choosing a PAID edition, you are verifying that you have the appropriate
number of licenses in place to install and run this software.

Enter your edition(1-8): 3
The license terms for this product can be found in
/usr/share/doc/mssql-server or downloaded from:
https://go.microsoft.com/fwlink/?LinkId=855862&clcid=0x409

The privacy statement can be viewed at:
https://go.microsoft.com/fwlink/?LinkId=853010&clcid=0x409

Enter the SQL Server system administrator password: 
Confirm the SQL Server system administrator password: 
Configuring SQL Server...

I can't tell what is the script waiting for, and if I do ctrl+c to cancel it, I get

^CTraceback (most recent call last):
  File "/opt/mssql/bin/../lib/mssql-conf/mssql-conf.py", line 277, in <module>
    main()
  File "/opt/mssql/bin/../lib/mssql-conf/mssql-conf.py", line 273, in main
    processCommands()
  File "/opt/mssql/bin/../lib/mssql-conf/mssql-conf.py", line 197, in processCommands
    COMMAND_TABLE[args.which]()
  File "/opt/mssql/bin/../lib/mssql-conf/mssql-conf.py", line 54, in handleSetup
    exit(mssqlconfhelper.setupSqlServer(eulaAccepted, noprompt=args.noprompt))
  File "/opt/mssql/lib/mssql-conf/mssqlconfhelper.py", line 833, in setupSqlServer
    ret = configureSqlservrWithArguments("--setup --reset-sa-password", MSSQL_SA_PASSWORD=encodedPassword, MSSQL_PID=pid)
  File "/opt/mssql/lib/mssql-conf/mssqlconfhelper.py", line 737, in configureSqlservrWithArguments
    return subprocess.call(args, env=env)
  File "/usr/lib/python2.7/subprocess.py", line 523, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 1392, in wait
    pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
  File "/usr/lib/python2.7/subprocess.py", line 476, in _eintr_retry_call
    return func(*args)
KeyboardInterrupt\

so in def configureSqlservrWithArguments(*args, **kwargs): at line 721 of mssqlconfhelper.py there is a subprocess call to invokesqlservr.sh which is probably the source of the problem. From inspection I can see that it runs sqlservr and passes --setup and --reset-sa-password, I suppose.

#!/bin/bash
cd /var/opt/mssql

CMDLINE="/opt/mssql/bin/sqlservr $@"

echo ""

# If running as mssql then execute the command. Else sudo -u to mssql
if [ "$(id -u -n)" == "mssql" ]; then
    /bin/bash -c "$CMDLINE"
    retcode=$?
else
    sudo -EH -u mssql /bin/bash -c "$CMDLINE"
    retcode=$?
fi

exit $retcode

If I run sqlservr directly, execution stalls at

2018-05-21 19:43:45.74 spid6s      Ending provisioning of CEIPLoginName.       
2018-05-21 19:43:45.75 spid6s      ------------------------------------------------------
2018-05-21 19:43:45.79 spid6s      SQL Server is now ready for client connections. This is an informational message; no user action is required.
2018-05-21 19:43:45.79 spid6s      Recovery is complete. This is an informational message only. No user action is required.
2018-05-21 19:43:51.44 spid66      Using 'dbghelp.dll' version '4.0.5'
2018-05-21 19:44:12.07 spid66      Attempting to load library 'xplog70.dll' into memory. This is an informational message only. No user action is required.
2018-05-21 19:44:12.20 spid66      Using 'xplog70.dll' version '2017.140.3025' to execute extended stored procedure 'xp_msver'. This is an informational message only; no user action is required.

How can I fix this? Is here the place to ask for this kind of stuff?

also

diego@envy:~$ uname --a
Linux envy 4.13.0-41-generic #46~16.04.1-Ubuntu SMP Thu May 3 10:06:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Thanks!

microsoft / sqldev

mssql-conf setup freezes and never finishes #41