error

No ghcjs-pkg found
No greencard found
Using haddock version 2.16.0 found on system at:
/nix/store/37d4r09fx6ipgp3kla9kpjr8krvqpnp6-ghc-7.10.1/bin/haddock
No happy found
Using haskell-suite found on system at: haskell-suite-dummy-location
Using haskell-suite-pkg found on system at: haskell-suite-pkg-dummy-location
No hmake found
Using hpc version 0.67 found on system at:
/nix/store/37d4r09fx6ipgp3kla9kpjr8krvqpnp6-ghc-7.10.1/bin/hpc
Using hsc2hs version 0.67 found on system at:
/nix/store/37d4r09fx6ipgp3kla9kpjr8krvqpnp6-ghc-7.10.1/bin/hsc2hs
Using hscolour version 1.22 found on system at:
/nix/store/mkddm206qphxli8fvlha37fp40jigagn-hscolour-1.23/bin/HsColour
No jhc found
Using ld found on system at:
/nix/store/023rf2fbd7ajia2kgkh9ikk09fs9p3gg-clang-wrapper-3.6.1/bin/ld
No lhc found
No lhc-pkg found
No pkg-config found
Using strip found on system at:
/nix/store/wj9m2x8cgc0igrcj7l9vqy9n439f7k23-cctools-port-862/bin/strip
Using tar found on system at:
/nix/store/54cawsvhyilwwx9ba99rdasahba028z4-gnutar-1.28/bin/tar
No uhc found
building
Building ghc-mod-5.2.1.2...
Preprocessing library ghc-mod-5.2.1.2...

Language/Haskell/GhcMod/Convert.hs:1:51: Warning:
    -XOverlappingInstances is deprecated: instead use per-instance pragmas OVERLAPPING/OVERLAPPABLE/OVERLAPS
[ 1 of 38] Compiling Language.Haskell.GhcMod.Read ( Language/Haskell/GhcMod/Read.hs, dist/build/Language/Haskell/GhcMod/Read.o )
[ 2 of 38] Compiling Language.Haskell.GhcMod.Cabal21 ( Language/Haskell/GhcMod/Cabal21.hs, dist/build/Language/Haskell/GhcMod/Cabal21.o )
[ 3 of 38] Compiling Language.Haskell.GhcMod.Cabal18 ( Language/Haskell/GhcMod/Cabal18.hs, dist/build/Language/Haskell/GhcMod/Cabal18.o )
[ 4 of 38] Compiling Language.Haskell.GhcMod.Cabal16 ( Language/Haskell/GhcMod/Cabal16.hs, dist/build/Language/Haskell/GhcMod/Cabal16.o )
[ 5 of 38] Compiling Language.Haskell.GhcMod.GHCChoice ( Language/Haskell/GhcMod/GHCChoice.hs, dist/build/Language/Haskell/GhcMod/GHCChoice.o )
[ 6 of 38] Compiling Language.Haskell.GhcMod.Error ( Language/Haskell/GhcMod/Error.hs, dist/build/Language/Haskell/GhcMod/Error.o )

Language/Haskell/GhcMod/Error.hs:12:1: Warning:
    Module ‘Control.Monad.Error’ is deprecated:
      Use Control.Monad.Except instead

Language/Haskell/GhcMod/Error.hs:40:10: Warning:
    In the use of type constructor or class ‘Error’
    (imported from Control.Monad.Error, but defined in Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"

Language/Haskell/GhcMod/Error.hs:40:10: Warning:
    In the use of type constructor or class ‘Error’
    (imported from Control.Monad.Error, but defined in Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
[ 7 of 38] Compiling Language.Haskell.GhcMod.Utils ( Language/Haskell/GhcMod/Utils.hs, dist/build/Language/Haskell/GhcMod/Utils.o )

Language/Haskell/GhcMod/Utils.hs:15:1: Warning:
    The import of ‘Control.Applicative’ is redundant
      except perhaps to import instances from ‘Control.Applicative’
    To import instances alone, use: import Control.Applicative()

Language/Haskell/GhcMod/Utils.hs:45:51: Warning:
    In the use of ‘strMsg’
    (imported from Language.Haskell.GhcMod.Error, but defined in Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
[ 8 of 38] Compiling Language.Haskell.GhcMod.Types ( Language/Haskell/GhcMod/Types.hs, dist/build/Language/Haskell/GhcMod/Types.o )
[ 9 of 38] Compiling Language.Haskell.GhcMod.Gap ( Language/Haskell/GhcMod/Gap.hs, dist/build/Language/Haskell/GhcMod/Gap.o )

Language/Haskell/GhcMod/Gap.hs:256:18:
    Not in scope: data constructor ‘ExposePackageId’
    Perhaps you meant ‘ExposePackage’ (imported from DynFlags)
builder for ‘/nix/store/x1zyql2r0q35ks28y4r1a9zhm2v1ds04-haskell-ghc-mod-5.2.1.2.drv’ failed with exit code 1
cannot build derivation ‘/nix/store/6p6fmqlc163g36z55s0qnw2xbwv4gkz5-ghc-7.10.1.drv’: 1 dependencies couldn't be built
error: build of ‘/nix/store/6p6fmqlc163g36z55s0qnw2xbwv4gkz5-ghc-7.10.1.drv’ failed