Resolving dependencies... cabal: Could not resolve dependencies: next goal: uri-conduit (user goal) rejecting: uri-conduit-1.1.1.2, uri-conduit-1.1.1.1, uri-conduit-1.1.1, uri-conduit-1.1.0, uri-conduit-0.5.0.2, uri-conduit-0.5.0.1, uri-conduit-0.5.0, uri-conduit-0.4.0.1, uri-conduit-0.4.0, uri-conduit-0.3.0 (constraint from user target requires ==0.2.1.1) trying: uri-conduit-0.2.1.1 trying: base-4.9.0.0/installed-4.9... (dependency of uri-conduit-0.2.1.1) trying: time-1.6.0.1/installed-1.6... (dependency of system-fileio-0.3.16.3) next goal: containers (dependency of uri-conduit-0.2.1.1) rejecting: containers-0.5.7.1/installed-0.5..., containers-0.5.9.1, containers-0.5.8.1, containers-0.5.7.1, containers-0.5.7.0, containers-0.5.6.3, containers-0.5.6.2, containers-0.5.6.1, containers-0.5.6.0, containers-0.5.5.1, containers-0.5.5.0, containers-0.5.4.0, containers-0.5.3.1, containers-0.5.3.0, containers-0.5.2.1, containers-0.5.2.0, containers-0.5.1.0, containers-0.5.0.0 (conflict: uri-conduit => containers>=0.2 && <0.5) rejecting: containers-0.4.2.1 (conflict: time => deepseq==1.4.2.0/installed-1.4..., containers => deepseq>=1.2 && <1.4) rejecting: containers-0.4.2.0 (conflict: time => deepseq==1.4.2.0/installed-1.4..., containers => deepseq>=1.2 && <1.3) rejecting: containers-0.4.1.0 (conflict: base==4.9.0.0/installed-4.9..., containers => base>=4.2 && <4.8) rejecting: containers-0.4.0.0, containers-0.3.0.0 (conflict: base==4.9.0.0/installed-4.9..., containers => base>=4.2 && <4.7) rejecting: containers-0.2.0.1, containers-0.2.0.0 (conflict: base==4.9.0.0/installed-4.9..., containers => base<4.7) rejecting: containers-0.1.0.1, containers-0.1.0.0 (conflict: uri-conduit => containers>=0.2 && <0.5) Dependency tree exhaustively searched.