coreutils builds on Hydra broken since Oct. 5th

[Bernhard Voelker]

http://hydra.nixos.org/job/gnu/coreutils-master/build/errors, e.g.
http://hydra.nixos.org/build/3338727/log/raw:

  [qsource root is vly0xg7509kpdxbk5bd5g92l7bssvcsd-git-export
  patching sources
  autoconfPhase
  sed: can't read src/wheel-gen.pl: No such file or directory

Other builds stop like this:
http://hydra.nixos.org/build/3338726/log/tail-reload

  source root is coreutils-tarball-0
  patching sources
  configuring
  no configure script, doing nothing
  building
  no Makefile, doing nothing
  running tests
  check flags:
  make: *** No rule to make target `check'.  Stop.

There must be something basically wrong now.
But I don't see it. Any clues?

Have a nice day,
Berny