Resolving dependencies... cabal: Could not resolve dependencies: trying: base-4.9.0.0/installed-4.9... (dependency of lambdacat-0.1.1) next goal: cmdargs (dependency of lambdacat-0.1.1) rejecting: cmdargs-0.10.14, cmdargs-0.10.13, cmdargs-0.10.12, cmdargs-0.10.11, cmdargs-0.10.10, cmdargs-0.10.9, cmdargs-0.10.8, cmdargs-0.10.7, cmdargs-0.10.6, cmdargs-0.10.5, cmdargs-0.10.4, cmdargs-0.10.3, cmdargs-0.10.2, cmdargs-0.10.1, cmdargs-0.10, cmdargs-0.9.7, cmdargs-0.9.6, cmdargs-0.9.5, cmdargs-0.9.4, cmdargs-0.9.3, cmdargs-0.9.2, cmdargs-0.9.1, cmdargs-0.9, cmdargs-0.8, cmdargs-0.7 (conflict: lambdacat => cmdargs==0.6.*) trying: cmdargs-0.6.10 next goal: transformers (dependency of cmdargs-0.6.10) 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, transformers-0.3.0.0 (conflict: cmdargs => transformers==0.2.*) rejecting: 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: cmdargs => transformers==0.2.*) 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: cmdargs => transformers==0.2.*) Dependency tree exhaustively searched.