Chrome Version: 61.0.3144.0
Chrome OS Version: 9695.0
Chrome OS Platform: elm

Builds have been broken on elm (Acer Chromebook R13) since about the 28th of July, the build fails every time with this at the end of the log:

2017-07-04 04:03:45,772 INFO:[blocks B      ] <media-libs/img-ddk-bin-1.8 ("<media-libs/img-ddk-bin-1.8" is blocking media-libs/mesa-img-12.1.0-r9)
2017-07-04 04:03:45,772 INFO:
2017-07-04 04:03:45,772 INFO:* Error: The above package list contains packages which cannot be
2017-07-04 04:03:45,772 INFO:* installed at the same time on the same system.
2017-07-04 04:03:45,772 INFO:
2017-07-04 04:03:45,772 INFO:(media-libs/img-ddk-bin-1.7.4304113-r67:0/0::chipset-mt8173, ebuild scheduled for merge to '/build/elm/') pulled in by
2017-07-04 04:03:45,772 INFO:media-libs/img-ddk-bin required by (virtual/img-ddk-2-r1:0/0::chipset-mt8173, ebuild scheduled for merge to '/build/elm/')
2017-07-04 04:03:45,772 INFO:
2017-07-04 04:03:45,773 INFO:(media-libs/mesa-img-12.1.0-r9:0/0::chromiumos, ebuild scheduled for merge to '/build/elm/') pulled in by
2017-07-04 04:03:45,773 INFO:media-libs/mesa-img required by (virtual/opengles-2-r1:0/0::chipset-mt8173, ebuild scheduled for merge to '/build/elm/')
2017-07-04 04:03:45,773 INFO: