Resolving dependencies... cabal: Could not resolve dependencies: trying: Parallel-Arrows-Eden-0.1.1.0 (user goal) trying: base-4.10.1.0/installed-4.1... (dependency of Parallel-Arrows-Eden-0.1.1.0) trying: edenmodules-1.2.0.0 (dependency of Parallel-Arrows-Eden-0.1.1.0) next goal: containers (dependency of edenmodules-1.2.0.0) rejecting: containers-0.5.10.2/installed-0.5... (conflict: containers => deepseq==1.4.3.0/installed-1.4..., edenmodules => deepseq>=1.1 && <1.4) trying: containers-0.5.10.2 trying: array-0.5.2.0/installed-0.5... (dependency of containers-0.5.10.2) next goal: deepseq (dependency of Parallel-Arrows-Eden-0.1.1.0) rejecting: deepseq-1.4.3.0/installed-1.4..., deepseq-1.4.3.0, deepseq-1.4.2.0, deepseq-1.4.1.2, deepseq-1.4.1.1, deepseq-1.4.1.0, deepseq-1.4.0.0 (conflict: edenmodules => deepseq>=1.1 && <1.4) rejecting: deepseq-1.3.0.2 (conflict: base==4.10.1.0/installed-4.1..., deepseq => base>=4.3 && <4.8) rejecting: deepseq-1.3.0.1, deepseq-1.3.0.0 (conflict: array==0.5.2.0/installed-0.5..., deepseq => array>=0.1 && <0.5) rejecting: deepseq-1.2.0.1 (conflict: array==0.5.2.0/installed-0.5..., deepseq => array>=0.1 && <0.4) rejecting: deepseq-1.2.0.0 (conflict: base==4.10.1.0/installed-4.1..., deepseq => base>=3 && <4.4) rejecting: deepseq-1.1.0.2, deepseq-1.1.0.1, deepseq-1.1.0.0 (conflict: containers => deepseq>=1.2 && <1.5) rejecting: deepseq-1.0.0.0 (conflict: edenmodules => deepseq>=1.1 && <1.4) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: array, deepseq, base, edenmodules, containers, Parallel-Arrows-Eden