bug#50066: core-update: Raw origin tarballs are not handled correctly.

[Mathieu Othacehe]

Hey Maxim,

> successfully built 
> /gnu/store/vag2a53byhgrkpchviqz78lilall6412-emacs-org-contrib-20210519.drv
> /gnu/store/40hl0dli745i2ggs1aqhn2drh0fkmrbx-emacs-org-contrib-20210519

Thanks for fixing this one,

Closing,

Mathieu