Almost all the igalia JSC bots are failing while importing six while running git-webkit command. e.g.:

JSC-MIPSEL-32bits-Tests-EWS: https://ews-build.webkit.org/#/builders/45/builds/1885
JSC-ARMv7-32bits-Build-EWS: https://ews-build.webkit.org/#/builders/38/builds/10827
JSC-ARMv7-32bits-Tests-EWS: https://ews-build.webkit.org/#/builders/46/builds/2931
JSC-i386-32bits-EWS: https://ews-build.webkit.org/#/builders/27/builds/30403
JSC-MIPSEL-32bits-Build-EWS: https://ews-build.webkit.org/#/builders/37/builds/10750

  File "/home/ews/worker/JSC-i386-32bits-EWS/build/Tools/Scripts/libraries/webkitcorepy/webkitcorepy/__init__.py", line 37, in <module>
    from webkitcorepy.task_pool import TaskPool
  File "/home/ews/worker/JSC-i386-32bits-EWS/build/Tools/Scripts/libraries/webkitcorepy/webkitcorepy/task_pool.py", line 30, in <module>
    from six import reraise
ImportError: No module named six
program finished with exit code 1

On most machine the issue seems to be happening only in show-identifier build-step which is non-fatal error. But on igalia-jsc32-mipsel-ews (https://ews-build.webkit.org/#/workers/82) it seems to fails in multiple steps with similar error, e.g.: https://ews-build.webkit.org/#/builders/45/builds/1885