LLudovic Courtès wrote on 5 Dec 2021 16:29
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As stikonas (Andrius Štikonas) rightfully pointed out on #guix, Flex and
Bison are currently not entirely built from source in Guix: their source
tarballs contain Flex- and/or Bison-generated files.
The problem and a solution are described here:
The “live-bootstrap” project also implements a multi-stage bootstrap:
Let’s follow their lead on the next core-updates cycle.
Thanks stikonas for the links!