Resolving dependencies...
Configuring omega-1.5.2...
Building omega-1.5.2...
Failed to install omega-1.5.2
Build log ( /home/builder/.cabal/logs/omega-1.5.2.log ):
cabal: Entering directory '/tmp/cabal-tmp-21929/omega-1.5.2'
Configuring omega-1.5.2...
Building omega-1.5.2...
Preprocessing executable 'omega' for omega-1.5.2...
[ 1 of 31] Compiling Version          ( Version.hs, dist/build/omega/omega-tmp/Version.o )
[ 2 of 31] Compiling PureReadline     ( PureReadline.hs, dist/build/omega/omega-tmp/PureReadline.o )

PureReadline.hs:82:1: warning: [-Wtabs]
    Tab character found here, and in 306 further locations.
    Please use spaces instead.
[ 3 of 31] Compiling ParseError       ( ParseError.hs, dist/build/omega/omega-tmp/ParseError.o )
[ 4 of 31] Compiling DepthFirstSearch ( DepthFirstSearch.hs, dist/build/omega/omega-tmp/DepthFirstSearch.o )
[ 5 of 31] Compiling SCC              ( SCC.hs, dist/build/omega/omega-tmp/SCC.o )
[ 6 of 31] Compiling CommentDef       ( CommentDef.hs, dist/build/omega/omega-tmp/CommentDef.o )
[ 7 of 31] Compiling Parser           ( Parser.hs, dist/build/omega/omega-tmp/Parser.o )

Parser.hs:336:10: error:
    • No instance for (Applicative Parser)
        arising from the superclasses of an instance declaration
    • In the instance declaration for ‘Monad Parser’

Parser.hs:377:10: error:
    • No instance for (GHC.Base.Alternative Parser)
        arising from the superclasses of an instance declaration
    • In the instance declaration for ‘MonadPlus Parser’
cabal: Leaving directory '/tmp/cabal-tmp-21929/omega-1.5.2'
cabal: Error: some packages failed to install:
omega-1.5.2 failed during the building phase. The exception was:
ExitFailure 1