Resolving dependencies...
Downloading sequence-0.9.1...
Configuring sequence-0.9.1...
Building sequence-0.9.1...
Failed to install sequence-0.9.1
Build log ( /home/builder/.cabal/logs/sequence-0.9.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-29984/sequence-0.9.1'
Configuring sequence-0.9.1...
Building sequence-0.9.1...
Preprocessing library sequence-0.9.1...
[1 of 5] Compiling Data.SequenceClass ( Data/SequenceClass.hs, dist/build/Data/SequenceClass.o )

Data/SequenceClass.hs:22:1: error:
    Failed to load interface for ‘Data.Sequence’
    It is a member of the hidden package ‘containers-0.5.7.1’.
    Perhaps you need to add ‘containers’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-29984/sequence-0.9.1'
cabal: Error: some packages failed to install:
sequence-0.9.1 failed during the building phase. The exception was:
ExitFailure 1