Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: cabal-install (user goal)
rejecting: cabal-install-1.22.6.0, 1.22.5.0, 1.22.4.0, 1.22.3.0, 1.22.2.0,
1.22.0.1, 1.22.0.0, 1.20.1.0, 1.20.0.6, 1.20.0.5, 1.20.0.4, 1.20.0.3,
1.20.0.2, 1.20.0.1, 1.20.0.0, 1.18.1.0, 1.18.0.8, 1.18.0.7, 1.18.0.6,
1.18.0.5, 1.18.0.4, 1.18.0.3, 1.18.0.2, 1.18.0.1, 1.18.0, 1.16.1.0, 1.16.0.2,
1.16.0.1, 1.16.0, 0.14.1, 0.14.0, 0.10.2, 0.10.0, 0.8.2, 0.8.0, 0.6.4, 0.6.2,
0.6.0, 0.5.2, 0.5.1, 0.5.0 (global constraint requires ==0.4.0)
trying: cabal-install-0.4.0
trying: base-4.8.1.0/installed-4f7... (dependency of cabal-install-0.4.0)
next goal: HTTP (dependency of cabal-install-0.4.0)
rejecting: HTTP-4000.2.20, 4000.2.19, 4000.2.18, 4000.2.17, 4000.2.16.1,
4000.2.16, 4000.2.15, 4000.2.14, 4000.2.13, 4000.2.12, 4000.2.11, 4000.2.10,
4000.2.9, 4000.2.8, 4000.2.7, 4000.2.6, 4000.2.5, 4000.2.4, 4000.2.3,
4000.2.2, 4000.2.1, 4000.2.0, 4000.1.2, 4000.1.1, 4000.1.0, 4000.0.10,
4000.0.9, 4000.0.8, 4000.0.7, 4000.0.6, 4000.0.5, 4000.0.4, 4000.0.3,
4000.0.2, 4000.0.1, 4000.0.0, 3001.1.5, 3001.1.4, 3001.1.3 (conflict:
cabal-install => HTTP>=3000.0 && <3001.1)
trying: HTTP-3001.0.4
rejecting: HTTP-3001.0.4:-old-base (conflict: base==4.8.1.0/installed-4f7...,
HTTP-3001.0.4:old-base => base>=3 && <4.3)
rejecting: HTTP-3001.0.4:+old-base (conflict: base==4.8.1.0/installed-4f7...,
HTTP-3001.0.4:old-base => base<3)
Dependency tree exhaustively searched.