The build of haskell-shell-conduit for hurd-i386 (admittedly not a
release architecture) failed per the below excerpts from
https://buildd.debian.org/status/fetch.php?pkg=haskell-shell-conduit&arch=hurd-i386&ver=4.6.1-1&stamp=1511874825&raw=0:

    test/Spec.hs:14:
    1) SHELL path functions false
         uncaught exception: IOException of type IllegalOperation (<file descriptor: 3>: hGetBufSome: illegal operation (handle is not open for reading))
  [...]
  Finished in 0.0400 seconds
  12 examples, 12 failures
  Test suite test: FAIL

Could you please take a look?  (The other 11 tests failed in the same
fashion.)

Thanks!