Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: mega-sdist (user goal)
rejecting: mega-sdist-0.2.10.4, 0.2.10.3, 0.2.10.2, 0.2.10.1, 0.2.10, 0.2.0.9,
0.2.0.8, 0.2.0.7 (global constraint requires ==0.2.0.6)
trying: mega-sdist-0.2.0.6
trying: base-4.8.1.0/installed-4f7... (dependency of mega-sdist-0.2.0.6)
trying: transformers-0.4.2.0/installed-21d... (dependency of
mega-sdist-0.2.0.6)
next goal: zlib-conduit (dependency of mega-sdist-0.2.0.6)
rejecting: zlib-conduit-1.1.0, 1.0.0 (conflict: mega-sdist =>
zlib-conduit>=0.5 && <0.6)
rejecting: zlib-conduit-0.5.0.3, 0.5.0.2, 0.5.0.1 (conflict:
transformers==0.4.2.0/installed-21d..., zlib-conduit => transformers>=0.2.2 &&
<0.4)
rejecting: zlib-conduit-0.5.0 (conflict: base==4.8.1.0/installed-4f7...,
zlib-conduit => base>=4 && <4.6)
rejecting: zlib-conduit-0.4.0.2, 0.4.0.1, 0.4.0, 0.3.0, 0.2.0.1, 0.2.0, 0.0.1,
0.0.0 (conflict: mega-sdist => zlib-conduit>=0.5 && <0.6)
Backjump limit reached (change with --max-backjumps).