Resolving dependencies...
Downloading seclib-0.2...
Configuring seclib-0.2...
Building seclib-0.2...
Preprocessing library seclib-0.2...
[1 of 7] Compiling SecLib.Lattice   ( SecLib/Lattice.hs, dist/build/SecLib/Lattice.o )
[2 of 7] Compiling SecLib.Sec       ( SecLib/Sec.hs, dist/build/SecLib/Sec.o )

SecLib/Sec.hs:39:22:
    Could not deduce (Less s s'0) arising from a use of `less'
    from the context (Less s s')
      bound by the type signature for
                 up :: Less s s' => Sec s a -> Sec s' a
      at SecLib/Sec.hs:38:7-38
    The type variable `s'0' is ambiguous
    Possible fix: add a type signature that fixes these type variable(s)
    In the first argument of `seq', namely less s s'
    In the expression: less s s' `seq` sec_s'
    In an equation for `up':
        up sec_s@(MkSec a)
          = less s s' `seq` sec_s'
          where
              (sec_s') = MkSec a
              s = unSecType sec_s
              s' = unSecType sec_s'
Failed to install seclib-0.2
cabal: Error: some packages failed to install:
seclib-0.2 failed during the building phase. The exception was:
ExitFailure 1