Resolving dependencies... cabal: Could not resolve dependencies: trying: base-4.9.0.0/installed-4.9... (dependency of fpco-api-1.0.1) next goal: persistent-template (dependency of fpco-api-1.0.1) rejecting: persistent-template-2.5.1.6, persistent-template-2.5.1.5, persistent-template-2.5.1.4, persistent-template-2.5.1.3, persistent-template-2.5.1.2, persistent-template-2.5.1.1, persistent-template-2.5.1, persistent-template-2.5, persistent-template-2.1.8.1, persistent-template-2.1.8, persistent-template-2.1.7, persistent-template-2.1.6, persistent-template-2.1.5, persistent-template-2.1.4, persistent-template-2.1.3.7, persistent-template-2.1.3.6, persistent-template-2.1.3.4, persistent-template-2.1.3.3, persistent-template-2.1.3.1, persistent-template-2.1.3, persistent-template-2.1.1, persistent-template-2.1.0.1, persistent-template-2.1, persistent-template-2.0.8, persistent-template-2.0.7, persistent-template-2.0.5, persistent-template-2.0.1.1, persistent-template-1.3.2.2, persistent-template-1.3.2.1, persistent-template-1.3.1.4, persistent-template-1.3.1.3, persistent-template-1.3.1.2, persistent-template-1.3.1.1, persistent-template-1.3.1, persistent-template-1.3.0 (conflict: fpco-api => persistent-template==1.2.*) trying: persistent-template-1.2.0.6 next goal: transformers (dependency of persistent-template-1.2.0.6) rejecting: transformers-0.5.2.0/installed-0.5..., transformers-0.5.2.0, transformers-0.5.1.0, transformers-0.5.0.1, transformers-0.5.0.0, transformers-0.4.3.0, transformers-0.4.2.0, transformers-0.4.1.0 (conflict: persistent-template => transformers>=0.2 && <0.4) rejecting: transformers-0.3.0.0, transformers-0.2.2.1 (conflict: base==4.9.0.0/installed-4.9..., transformers => base>=2 && <4.8 || >=1.0 && <2) rejecting: transformers-0.2.1.0, transformers-0.2.0.0 (conflict: base==4.9.0.0/installed-4.9..., transformers => base>=2 && <4.3 || >=1.0 && <2) rejecting: transformers-0.1.4.0, transformers-0.1.3.0, transformers-0.1.1.0, transformers-0.1.0.1, transformers-0.0.1.0, transformers-0.0.0.0, transformers-0.5.0.2, transformers-0.4.0.0 (conflict: persistent-template => transformers>=0.2 && <0.4) rejecting: transformers-0.2.2.0 (conflict: base==4.9.0.0/installed-4.9..., transformers => base>=2 && <4.6 || >=1.0 && <2) rejecting: transformers-0.1.0.0 (conflict: persistent-template => transformers>=0.2 && <0.4) Dependency tree exhaustively searched.