Recent cyan chrome pfq failing the error pattern attached below. Rajat could you take a look?

https://uberchromegw.corp.google.com/i/chromeos/builders/cyan-chrome-pfq/builds/3108

cl in question: crrev.com/c/1027128

RunCommandError: return code: 1; command: /b/c/cbuild/repository/chromite/bin/cros_sdk -- emerge-cyan -p --cols --quiet --root /var/empty -e virtual/target-os
 * Tarballs should not encode ebuild rev numbers (-r#).
 * The ebuild revision field is only for changes to the ebuild itself.
 * If you want to update the source tarball, update the PV instead.
 *   bad: foo-0.0.1-r8.tbz2 or foo-0.0.1.tbz2 -> foo-0.0.1-r1.tbz2
 *  good: foo-0.0.8.tbz2    or foo-0.0.1.tbz2 -> foo-0.0.2.tbz2
emerge: there are no ebuilds to satisfy "net-wireless/iwlwifi_rescan" for /var/empty/.
(dependency required by "chromeos-base/chromeos-bsp-cyan-0.0.2-r14::cyan" [ebuild])
(dependency required by "virtual/chromeos-bsp-3-r2::cyan-private" [ebuild])