build failure with classy-prelude 0.12.7

[DanBurton]

Looks like there's an easy fix: just pick one.

[ 1 of 19] Compiling Stackage.Curator.UploadDocs ( Stackage/Curator/UploadDocs.hs, dist/build/Stackage/Curator/UploadDocs.o )

Stackage/Curator/UploadDocs.hs:122:34:
    Ambiguous occurrence ‘threadDelay’
    It could refer to either ‘ClassyPrelude.Conduit.threadDelay’,
                             imported from ‘ClassyPrelude.Conduit’ at Stackage/Curator/UploadDocs.hs:14:1-38
                             (and originally defined in ‘lifted-base-0.2.3.6:Control.Concurrent.Lifted’)
                          or ‘Control.Concurrent.threadDelay’,
                             imported from ‘Control.Concurrent’ at Stackage/Curator/UploadDocs.hs:47:28-38
                             (and originally defined in ‘GHC.Conc.IO’)

[snoyberg]

Uploaded to Hackage