Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: pandoc (user goal)
rejecting: pandoc-1.19.1, pandoc-1.19, pandoc-1.18, pandoc-1.17.2,
pandoc-1.17.1, pandoc-1.17.0.3, pandoc-1.17.0.2, pandoc-1.17.0.1, pandoc-1.17,
pandoc-1.16.0.2, pandoc-1.16.0.1, pandoc-1.16, pandoc-1.15.2.1, pandoc-1.15.2,
pandoc-1.15.1.1, pandoc-1.15.1, pandoc-1.15.0.6, pandoc-1.15.0.5,
pandoc-1.15.0.4, pandoc-1.15.0.3, pandoc-1.15.0.2, pandoc-1.14.1,
pandoc-1.13.2.1, pandoc-1.13.2, pandoc-1.13.1, pandoc-1.13.0.1, pandoc-1.13,
pandoc-1.12.4.2 (constraint from user target requires ==1.12.4)
trying: pandoc-1.12.4
trying: base-4.9.0.0/installed-4.9... (dependency of pandoc-1.12.4)
next goal: scientific (dependency of pandoc-1.12.4)
rejecting: scientific-0.3.4.9, scientific-0.3.4.8, scientific-0.3.4.7,
scientific-0.3.4.6, scientific-0.3.4.5, scientific-0.3.4.4,
scientific-0.3.4.3, scientific-0.3.4.2, scientific-0.3.4.1,
scientific-0.3.4.0, scientific-0.3.3.8, scientific-0.3.3.7,
scientific-0.3.3.6, scientific-0.3.3.5, scientific-0.3.3.4,
scientific-0.3.3.3, scientific-0.3.3.2, scientific-0.3.3.1,
scientific-0.3.3.0, scientific-0.3.2.2, scientific-0.3.2.1,
scientific-0.3.2.0, scientific-0.3.1.0, scientific-0.3.0.2,
scientific-0.3.0.1, scientific-0.3.0.0 (conflict: pandoc => scientific>=0.2 &&
<0.3)
rejecting: scientific-0.2.0.2, scientific-0.2.0.1, scientific-0.2.0.0
(conflict: base==4.9.0.0/installed-4.9..., scientific => base>=4.3 && <4.8)
rejecting: scientific-0.1.0.1, scientific-0.1.0.0, scientific-0.0.0.2,
scientific-0.0.0.1, scientific-0.0.0.0 (conflict: pandoc => scientific>=0.2 &&
<0.3)
Dependency tree exhaustively searched.