Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of ideas-math-1.2)
next goal: ideas (dependency of ideas-math-1.2)
rejecting: ideas-1.5, ideas-1.4, ideas-1.3.1 (conflict: ideas-math =>
ideas==1.3)
trying: ideas-1.3
trying: transformers-0.5.2.0/installed-0.5... (dependency of exceptions-0.8.3)
next goal: mtl (dependency of ideas-1.3)
rejecting: mtl-2.2.1, mtl-2.2.0.1, mtl-2.2 (conflict: ideas => mtl==2.1.*)
rejecting: mtl-2.1.3.1, mtl-2.1.2 (conflict:
transformers==0.5.2.0/installed-0.5..., mtl => transformers==0.3.*)
rejecting: mtl-2.1.1, mtl-2.1 (conflict: base==4.9.0.0/installed-4.9..., mtl
=> base<4.6)
rejecting: mtl-2.0.1.1, mtl-2.0.1.0, mtl-2.0.0.0, mtl-1.1.1.1, mtl-1.1.1.0,
mtl-1.1.0.2, mtl-1.1.0.1, mtl-1.1.0.0, mtl-1.0 (conflict: ideas => mtl==2.1.*)
Dependency tree exhaustively searched.