Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: gtk2hs-buildtools (user goal)
rejecting: gtk2hs-buildtools-0.13.0.4, 0.13.0.3, 0.13.0.2, 0.13.0.1, 0.13.0.0,
0.12.5.2, 0.12.5.1, 0.12.5.0, 0.12.4, 0.12.3.1, 0.12.3, 0.12.1, 0.12.0,
0.11.2, 0.11.1 (global constraint requires ==0.9)
trying: gtk2hs-buildtools-0.9
trying: base-4.8.1.0/installed-4f7... (dependency of gtk2hs-buildtools-0.9)
next goal: haskell98 (dependency of gtk2hs-buildtools-0.9)
rejecting: haskell98-2.0.0.3 (conflict: base==4.8.1.0/installed-4f7...,
haskell98 => base>=4.7 && <4.8)
rejecting: haskell98-2.0.0.2 (conflict: base==4.8.1.0/installed-4f7...,
haskell98 => base==4.6.*)
trying: haskell98-2.0.0.1
next goal: array (dependency of gtk2hs-buildtools-0.9)
rejecting: array-0.5.1.0/installed-d42..., 0.5.1.0, 0.5.0.0 (conflict:
haskell98 => array>=0.3 && <0.5)
rejecting: array-0.4.0.1 (conflict: base==4.8.1.0/installed-4f7..., array =>
base>=4.2 && <4.7)
rejecting: array-0.4.0.0 (conflict: base==4.8.1.0/installed-4f7..., array =>
base>=4.2 && <4.6)
rejecting: array-0.3.0.3 (conflict: base==4.8.1.0/installed-4f7..., array =>
base>=4.2 && <4.5)
rejecting: array-0.3.0.2, 0.3.0.1 (conflict: base==4.8.1.0/installed-4f7...,
array => base>=4.2 && <4.4)
rejecting: array-0.3.0.0 (conflict: base==4.8.1.0/installed-4f7..., array =>
base>=3 && <4.4)
rejecting: array-0.2.0.0, 0.1.0.0 (conflict: haskell98 => array>=0.3 && <0.5)
Dependency tree exhaustively searched.