Resolving dependencies... cabal: Could not resolve dependencies: next goal: hOpenPGP (user goal) rejecting: hOpenPGP-2.5.5, hOpenPGP-2.5.4, hOpenPGP-2.5.3, hOpenPGP-2.5.2, hOpenPGP-2.5.1, hOpenPGP-2.5, hOpenPGP-2.4.4, hOpenPGP-2.4.3, hOpenPGP-2.4.2, hOpenPGP-2.4.1, hOpenPGP-2.4, hOpenPGP-2.3, hOpenPGP-2.2.1, hOpenPGP-2.2, hOpenPGP-2.1 (constraint from user target requires ==2.0) trying: hOpenPGP-2.0 trying: base-4.9.0.0/installed-4.9... (dependency of hOpenPGP-2.0) next goal: unix (dependency of network-2.6.3.1) rejecting: unix-2.7.2.0/installed-2.7... (conflict: unix => time==1.6.0.1/installed-1.6..., hOpenPGP => time>=1.1 && <1.5) trying: unix-2.7.2.1 trying: deepseq-1.4.2.0/installed-1.4... (dependency of network-uri-2.6.1.0) next goal: time (dependency of hOpenPGP-2.0) rejecting: time-1.6.0.1/installed-1.6..., time-1.7, time-1.6.0.1, time-1.6, time-1.5.0.1, time-1.5 (conflict: hOpenPGP => time>=1.1 && <1.5) rejecting: time-1.4.2, time-1.4.1 (conflict: deepseq==1.4.2.0/installed-1.4..., time => deepseq>=1.1 && <1.4) rejecting: time-1.4.0.2 (conflict: base==4.9.0.0/installed-4.9..., time => base>=4.4 && <4.7) rejecting: time-1.4.0.1, time-1.4 (conflict: base==4.9.0.0/installed-4.9..., time => base<4.7) rejecting: time-1.3, time-1.2.0.5, time-1.2.0.4, time-1.2.0.3, time-1.2.0.2, time-1.2.0.1 (conflict: base==4.9.0.0/installed-4.9..., time => base>=4 && <4.7) rejecting: time-1.2 (conflict: base==4.9.0.0/installed-4.9..., time => base<0) rejecting: time-1.1.4, time-1.1.3, time-1.1.2.4, time-1.1.2.3, time-1.1.2.2, time-1.1.2.1, time-1.1.2.0 (conflict: unix => time>=1.2 && <1.7) rejecting: time-1.0 (conflict: hOpenPGP => time>=1.1 && <1.5) Backjump limit reached (currently 2000, change with --max-backjumps or try to run with --reorder-goals).