[ADD relevant info inline]

Link to build or pfq page. https://luci-milo.appspot.com/buildbot/chromeos/elm-release/1904
build # for that buildbot. 1904 

https://cros-goldeneye.corp.google.com/chromeos/console/listBuild?boards=elm%2Chana%2Coak&milestone=66&chromeOsVersion=&chromeVersion=&startTimeFrom=&startTimeTo=#%2F

BuildPackages failed, example:
https://logs.chromium.org/v/?s=chromeos%2Fbb%2Fchromeos%2Felm-release%2F1924%2F%2B%2Frecipes%2Fsteps%2FBuildPackages__afdo_use_%2F0%2Fstdout

chromeos-chrome-66.0.3341.0_rc-r1: Running hooks:  29% (17/58) gn_linux64
chromeos-chrome-66.0.3341.0_rc-r1: ________ running '/usr/bin/python2.7 src/third_party/depot_tools/download_from_google_storage.py --no_resume --no_auth --bucket chromium-gn -s src/buildtools/linux64/gn.sha1' in '/home/chrome-bot/chrome_root/.'
chromeos-chrome-66.0.3341.0_rc-r1: 0> Failed to fetch file gs://chromium-gn/ed8b2bc0617fee4ebd1d1a35e8a5bc168c4ca874 for src/buildtools/linux64/gn, skipping. [Err: [E2018-02-06T19:28:58.818578-08:00 5276 0 venv.go:826] Process output:
chromeos-chrome-66.0.3341.0_rc-r1: New python executable in /build/elm/tmp/portage/chromeos-base/chromeos-chrome-66.0.3341.0_rc-r1/homedir/.vpython-root/6005b1/bin/python2.7
chromeos-chrome-66.0.3341.0_rc-r1: Also creating executable in /build/elm/tmp/portage/chromeos-base/chromeos-chrome-66.0.3341.0_rc-r1/homedir/.vpython-root/6005b1/bin/python
chromeos-chrome-66.0.3341.0_rc-r1: Installing setuptools, pip, wheel...
chromeos-chrome-66.0.3341.0_rc-r1:   Complete output from command /build/elm/tmp/porta...6005b1/bin/python2.7 - setuptools pip wheel:
chromeos-chrome-66.0.3341.0_rc-r1:   Traceback (most recent call last):
chromeos-chrome-66.0.3341.0_rc-r1:   File "<stdin>", line 4, in <module>
chromeos-chrome-66.0.3341.0_rc-r1:   File "/usr/lib64/python2.7/tempfile.py", line 32, in <module>
chromeos-chrome-66.0.3341.0_rc-r1:     import io as _io
chromeos-chrome-66.0.3341.0_rc-r1:   File "/usr/lib64/python2.7/io.py", line 51, in <module>
chromeos-chrome-66.0.3341.0_rc-r1:     import _io
chromeos-chrome-66.0.3341.0_rc-r1: ImportError: No module named _io
chromeos-chrome-66.0.3341.0_rc-r1: ----------------------------------------
chromeos-chrome-66.0.3341.0_rc-r1: ...Installing setuptools, pip, wheel...done.
chromeos-chrome-66.0.3341.0_rc-r1: Traceback (most recent call last):
chromeos-chrome-66.0.3341.0_rc-r1:   File "virtualenv.py", line 2328, in <module>
chromeos-chrome-66.0.3341.0_rc-r1:     main()
chromeos-chrome-66.0.3341.0_rc-r1:   File "virtualenv.py", line 713, in main
chromeos-chrome-66.0.3341.0_rc-r1:     symlink=options.symlink)
chromeos-chrome-66.0.3341.0_rc-r1:   File "virtualenv.py", line 945, in create_environment
chromeos-chrome-66.0.3341.0_rc-r1:     download=download,
chromeos-chrome-66.0.3341.0_rc-r1:   File "virtualenv.py", line 901, in install_wheel
chromeos-chrome-66.0.3341.0_rc-r1:     call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
chromeos-chrome-66.0.3341.0_rc-r1:   File "virtualenv.py", line 797, in call_subprocess
chromeos-chrome-66.0.3341.0_rc-r1:     % (cmd_desc, proc.returncode))
chromeos-chrome-66.0.3341.0_rc-r1: OSError: Command /build/elm/tmp/porta...6005b1/bin/python2.7 - setuptools pip wheel failed with error code 1