ET.UTF-8.out: Inappropriate ioctl for device (buildworld RELENG8)

[Jeronimo Calvo]

Hi folks, Im getting the following error when building world for
RELENG_8 using GENERIC.
Any ideas on how to skip that?

===> share/mklocale (all)
mklocale -o UTF-8.out /usr/src/share/mklocale/UTF-8.src
mklocale -o am_ET.UTF-8.out /usr/src/share/mklocale/am_ET.UTF-8.src
am_ET.UTF-8.out: Inappropriate ioctl for device
*** Error code 1

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