[Pkg-haskell-maintainers] Bug#639038: does not build with alex 3

[Clint Adams]

Package: src:haskell-haddock
Version: 2.9.2-1

I need alex 3.0.1, but haskell-haddock does not build with it:

[ 7 of 33] Compiling Haddock.Lex      ( dist-ghc/build/Haddock/Lex.hs, dist-ghc/buil
d/Haddock/Lex.o )

src/Haddock/Lex.x:151:25:
    Couldn't match expected type `(AlexPosn, Char, [Byte], String)'
                with actual type `(t0, t1, t2)'
    Expected type: AlexInput
      Actual type: (t0, t1, t2)
    In the first argument of `alexScan', namely `inp'
    In the expression: alexScan inp sc
make: *** [build-ghc-stamp] Error 1