ghc-cabal: '/usr/bin/ghc-pkg' exited withghc-cabal: '/usr/bin/ghc-pkg' exited with an error:
ghc-pkg: ghc no longer supports single-file style package databases
(/builddir/build/BUILD/ghc-7.10.0.20141222/libraries/bootstrapping.conf) use
'ghc-pkg init' to create the database with the correct format.
 an error:
ghc-pkg: ghc no longer supportutils/hsc2hs/ghc.mk:15: recipe for target 'utils/hsc2hs/dist/package-data.mk' failed
make[1]: *** [utils/hsc2hs/dist/package-data.mk] Error 1
make[1]: *** Waiting for unfinished jobs....
s single-file style package databases
(/builddir/build/BUILD/ghc-7.10.0.20141222/libraries/bootstrapping.conf) use
'ghc-pkg init' to create the database with the correct format.
libraries/binary/ghc.mk:3: recipe for target 'libraries/binary/dist-boot/package-data.mk' failed
make[1]: *** [libraries/binary/dist-boot/package-data.mk] Error 1
Makefile:71: recipe for target 'all' failed
make: *** [all] Error 2

(See current https://copr-be.cloud.fedoraproject.org/results/petersen/ghc-7.10/fedora-rawhide-x86_64/ghc-7.10.0.20141222-0.2.fc21/ for the full buildlog.)

Is that a known issue?

Jens