Resolving dependencies... cabal: Could not resolve dependencies: next goal: uhc-util (user goal) rejecting: uhc-util-0.1.6.6, uhc-util-0.1.6.5, uhc-util-0.1.6.3, uhc-util-0.1.6.2, uhc-util-0.1.6.0, uhc-util-0.1.5.6, uhc-util-0.1.5.5, uhc-util-0.1.5.4, uhc-util-0.1.5.3, uhc-util-0.1.5.2, uhc-util-0.1.5.1, uhc-util-0.1.5.0, uhc-util-0.1.4.0, uhc-util-0.1.3.9, uhc-util-0.1.3.8, uhc-util-0.1.3.7, uhc-util-0.1.3.5, uhc-util-0.1.3.2, uhc-util-0.1.3.1, uhc-util-0.1.3.0, uhc-util-0.1.2.0, uhc-util-0.1.1.0, uhc-util-0.1.0.2, uhc-util-0.1.0.1 (constraint from user target requires ==0.1.0.0) trying: uhc-util-0.1.0.0 trying: bytestring-0.10.8.1/installed-0.1... (dependency of uhc-util-0.1.0.0) next goal: deepseq (dependency of bytestring-0.10.8.1/installed-0.1...) rejecting: deepseq-1.4.2.0/installed-1.4... (conflict: deepseq => array==0.5.1.1/installed-0.5..., uhc-util => array>=0.4 && <0.5) rejecting: 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, deepseq-1.3.0.2, deepseq-1.3.0.1, deepseq-1.3.0.0, deepseq-1.2.0.1, deepseq-1.2.0.0, deepseq-1.1.0.2, deepseq-1.1.0.1, deepseq-1.1.0.0, deepseq-1.0.0.0 (conflict: bytestring => deepseq==1.4.2.0/installed-1.4...) Dependency tree exhaustively searched.