Resolving dependencies...
Downloading data-extra-2.5.1...
Configuring data-extra-2.5.1...
Building data-extra-2.5.1...
Preprocessing library data-extra-2.5.1...
[ 1 of 11] Compiling Data.Eq.Extra    ( src/Data/Eq/Extra.hs, dist/build/Data/Eq/Extra.o )
[ 2 of 11] Compiling Data.Tuple.Extra ( src/Data/Tuple/Extra.hs, dist/build/Data/Tuple/Extra.o )
[ 3 of 11] Compiling Data.Number.Extra ( src/Data/Number/Extra.hs, dist/build/Data/Number/Extra.o )
[ 4 of 11] Compiling Data.Time.Extra  ( src/Data/Time/Extra.hs, dist/build/Data/Time/Extra.o )
[ 5 of 11] Compiling Data.Text.Extra  ( src/Data/Text/Extra.hs, dist/build/Data/Text/Extra.o )
[ 6 of 11] Compiling Data.String.Extra ( src/Data/String/Extra.hs, dist/build/Data/String/Extra.o )
[ 7 of 11] Compiling Data.Bool.Extra  ( src/Data/Bool/Extra.hs, dist/build/Data/Bool/Extra.o )
[ 8 of 11] Compiling Data.List.Extra  ( src/Data/List/Extra.hs, dist/build/Data/List/Extra.o )

src/Data/List/Extra.hs:12:39:
    Couldn't match expected type `Bool' with actual type `[a0] -> Bool'
    In the third argument of `bool', namely `null'
    In the expression: bool cons (const nil) null
    In an equation for `list':
        list nil cons = bool cons (const nil) null
Failed to install data-extra-2.5.1
cabal: Error: some packages failed to install:
data-extra-2.5.1 failed during the building phase. The exception was:
ExitFailure 1