Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: hPDB (user goal)
[__0] rejecting: hPDB-1.5.0.0, hPDB-1.4.0.0 (constraint from user target
requires ==1.3.0.0)
[__0] trying: hPDB-1.3.0.0
[__1] trying: base-4.11.1.0/installed-4.1... (dependency of hPDB)
[__2] next goal: Octree (dependency of hPDB)
[__2] rejecting: Octree-0.6.0.0, Octree-0.5.4.4, Octree-0.5.4.3 (conflict:
base==4.11.1.0/installed-4.1..., Octree => base>=4.0 && <4.11)
[__2] rejecting: Octree-0.5.4.2 (conflict: base==4.11.1.0/installed-4.1...,
Octree => base>=4.0 && <4.9)
[__2] rejecting: Octree-0.5.3, Octree-0.5.2 (conflict:
base==4.11.1.0/installed-4.1..., Octree => base>=4.0 && <4.8)
[__2] rejecting: Octree-0.5.1, Octree-0.5 (conflict:
base==4.11.1.0/installed-4.1..., Octree => base>=4.0 && <4.7)
[__2] rejecting: Octree-0.4, Octree-0.3, Octree-0.2.3, Octree-0.2.2,
Octree-0.2.1, Octree-0.2.0.1, Octree-0.2 (conflict: hPDB => Octree>=0.5)
[__2] rejecting: Octree-0.5.4.1 (conflict: base==4.11.1.0/installed-4.1...,
Octree => base>=4.0 && <4.8)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, hPDB, Octree