Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: tamarin-prover (user goal)
rejecting: tamarin-prover-0.8.6.3, 0.8.6.2, 0.8.6.1, 0.8.6.0, 0.8.5.1,
0.8.5.0, 0.8.4.0, 0.8.2.1, 0.8.2.0, 0.8.1.0, 0.8.0.0, 0.6.1.0, 0.6.0.0 (global
constraint requires ==0.4.1.0)
trying: tamarin-prover-0.4.1.0
trying: base-4.8.1.0/installed-4f7... (dependency of tamarin-prover-0.4.1.0)
next goal: syb (dependency of tamarin-prover-0.4.1.0)
rejecting: syb-0.6, 0.5.1, 0.5, 0.4.4, 0.4.3, 0.4.2, 0.4.1, 0.4.0 (conflict:
tamarin-prover => syb==0.3.* && >=0.3.3)
rejecting: syb-0.3.7, 0.3.6.2 (conflict: base==4.8.1.0/installed-4f7..., syb
=> base>=4.0 && <4.8)
rejecting: syb-0.3.6.1, 0.3.6 (conflict: base==4.8.1.0/installed-4f7..., syb
=> base>=4.0 && <4.6)
rejecting: syb-0.3.5, 0.3.4, 0.3.3 (conflict: base==4.8.1.0/installed-4f7...,
syb => base>=4.0 && <4.5)
rejecting: syb-0.3.2, 0.3.1, 0.3, 0.2.2, 0.2.1, 0.2, 0.1.0.3, 0.1.0.2,
0.1.0.1, 0.1.0.0 (conflict: tamarin-prover => syb==0.3.* && >=0.3.3)
Dependency tree exhaustively searched.