Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: Pugs (user goal)
rejecting: Pugs-6.2.13.20150815, 6.2.13.20130611, 6.2.13.20120717,
6.2.13.20120203, 6.2.13.20111008, 6.2.13.20110925, 6.2.13.20110519, 6.2.13.16,
6.2.13.15, 6.2.13.14, 6.2.13.13, 6.2.13.12, 6.2.13.11, 6.2.13.10, 6.2.13.9,
6.2.13.8, 6.2.13.7, 6.2.13.6, 6.2.13.5, 6.2.13.4 (global constraint requires
==6.2.13.3)
trying: Pugs-6.2.13.3
trying: base-4.8.1.0/installed-4f7... (dependency of Pugs-6.2.13.3)
trying: directory-1.2.2.0/installed-258... (dependency of Pugs-6.2.13.3)
next goal: haskell98 (dependency of Pugs-6.2.13.3)
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.*)
rejecting: haskell98-2.0.0.1, 2.0.0.0 (conflict:
directory==1.2.2.0/installed-258..., haskell98 => directory>=1.1 && <1.2)
rejecting: haskell98-1.1.0.1, 1.1.0.0, 1.0.1.1 (conflict:
base==4.8.1.0/installed-4f7..., haskell98 => base>=3 && <4.6)
rejecting: haskell98-1.0.1.0 (conflict: base==4.8.1.0/installed-4f7...,
haskell98 => base<4.6)
rejecting: haskell98-1.0 (conflict: base==4.8.1.0/installed-4f7..., haskell98
=> base<4.3)
Dependency tree exhaustively searched.