Resolving dependencies...
cabal: Could not resolve dependencies:
trying: Agda-executable-2.3.0.1 (user goal)
trying: base-4.8.1.0/installed-4f7... (dependency of Agda-executable-2.3.0.1)
next goal: Agda (dependency of Agda-executable-2.3.0.1)
rejecting: Agda-2.4.2.4, 2.4.2.3, 2.4.2.2, 2.4.2.1, 2.4.2, 2.4.0.2, 2.4.0.1,
2.4.0, 2.3.2.2, 2.3.2.1, 2.3.2 (conflict: Agda-executable => Agda==2.3.0.1)
trying: Agda-2.3.0.1
next goal: syb (dependency of Agda-2.3.0.1)
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:
Agda => syb>=0.1 && <0.4)
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 (conflict:
base==4.8.1.0/installed-4f7..., syb => base>=4.0 && <4.4)
rejecting: syb-0.2.1, 0.2, 0.1.0.3 (conflict: base==4.8.1.0/installed-4f7...,
syb => base>=4.0 && <4.3)
rejecting: syb-0.1.0.2 (conflict: base==4.8.1.0/installed-4f7..., syb =>
base>=4.1 && <4.3)
rejecting: syb-0.1.0.1 (conflict: base==4.8.1.0/installed-4f7..., syb =>
base<4.4)
rejecting: syb-0.1.0.0 (conflict: base==4.8.1.0/installed-4f7..., syb =>
base>=4.0 && <4.4)
Dependency tree exhaustively searched.