Resolving dependencies...
Configuring mtl-2.2.1...
Configuring syb-0.6...
Building mtl-2.2.1...
Building syb-0.6...
Installed syb-0.6
Installed mtl-2.2.1
Configuring set-extra-1.3...
Building set-extra-1.3...
Failed to install set-extra-1.3
Build log ( /home/builder/.cabal/logs/set-extra-1.3.log ):
cabal: Entering directory '/tmp/cabal-tmp-25951/set-extra-1.3'
Configuring set-extra-1.3...
Building set-extra-1.3...
Preprocessing library set-extra-1.3...
[1 of 2] Compiling Data.Set.ExtraG  ( Data/Set/ExtraG.hs, dist/build/Data/Set/ExtraG.o )
[2 of 2] Compiling Data.Set.Extra   ( Data/Set/Extra.hs, dist/build/Data/Set/Extra.o )

Data/Set/Extra.hs:41:13: error:
    Not in scope: ‘List.mapM_’
    Perhaps you meant one of these:
      ‘List.mapM’ (imported from Control.Monad),
      ‘List.map’ (imported from Data.List)
    Perhaps you want to add ‘mapM_’ to the import list in the import of
    ‘Control.Monad’ (Data/Set/Extra.hs:27:1-61).

Data/Set/Extra.hs:112:39: error:
    Not in scope: ‘Set.insert’
    Perhaps you meant one of these:
      ‘Map.insert’ (imported from Data.Map),
      ‘List.insert’ (imported from Data.List)
    No module named ‘Set’ is imported.

Data/Set/Extra.hs:112:56: error:
    Not in scope: ‘Set.insert’
    Perhaps you meant one of these:
      ‘Map.insert’ (imported from Data.Map),
      ‘List.insert’ (imported from Data.List)
    No module named ‘Set’ is imported.
cabal: Leaving directory '/tmp/cabal-tmp-25951/set-extra-1.3'
cabal: Error: some packages failed to install:
set-extra-1.3 failed during the building phase. The exception was:
ExitFailure 1