Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: GPX (user goal)
rejecting: GPX-0.8.0, 0.7.0, 0.6.3, 0.6.2, 0.6.1, 0.6.0, 0.5, 0.4.8, 0.4.7,
0.4.6, 0.4.5, 0.4.4, 0.4.3 (global constraint requires ==0.4.2)
trying: GPX-0.4.2
trying: base-4.8.1.0/installed-4f7... (dependency of GPX-0.4.2)
rejecting: GPX-0.4.2:+small_base (conflict: base==4.8.1.0/installed-4f7...,
GPX-0.4.2:small_base => base<4 && >=3)
rejecting: GPX-0.4.2:-small_base (conflict: base==4.8.1.0/installed-4f7...,
GPX-0.4.2:small_base => base<3)
Dependency tree exhaustively searched.