Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of qux-0.2.0.0)
next goal: optparse-applicative (dependency of qux-0.2.0.0)
rejecting: optparse-applicative-0.13.0.0, optparse-applicative-0.12.1.0,
optparse-applicative-0.12.0.0 (conflict: qux => optparse-applicative==0.11.*)
trying: optparse-applicative-0.11.0.2
next goal: transformers-compat (dependency of optparse-applicative-0.11.0.2)
rejecting: transformers-compat-0.5.1.4, transformers-compat-0.5.1.3,
transformers-compat-0.5.1.2, transformers-compat-0.5.0.4,
transformers-compat-0.5.0.3, transformers-compat-0.5.0.2 (conflict:
optparse-applicative => transformers-compat>=0.3 && <0.5)
trying: transformers-compat-0.4.0.4
trying: transformers-compat-0.4.0.4:-two
trying: transformers-compat-0.4.0.4:-three
next goal: transformers (dependency of optparse-applicative-0.11.0.2)
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 (conflict:
optparse-applicative => transformers>=0.2 && <0.5)
rejecting: transformers-0.4.3.0, transformers-0.4.2.0 (conflict:
base==4.9.0.0/installed-4.9..., transformers => base>=2 && <4.9)
rejecting: transformers-0.4.1.0 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base>=2 && <4.8 || >=1.0 && <2)
rejecting: transformers-0.3.0.0 (conflict: transformers-compat-0.4.0.4:three
=> transformers>=0.2 && <0.3 || >=0.4.1 && <0.5)
rejecting: transformers-0.2.2.1, transformers-0.2.1.0, transformers-0.2.0.0
(conflict: transformers-compat-0.4.0.4:three => transformers>=0.4.1 && <0.5)
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 (conflict: optparse-applicative => transformers>=0.2 &&
<0.5)
rejecting: transformers-0.4.0.0 (conflict: transformers-compat =>
transformers>=0.3 && <0.4 || >=0.2 && <0.3 || >=0.4.1 && <0.5)
rejecting: transformers-0.2.2.0 (conflict: transformers-compat-0.4.0.4:three
=> transformers>=0.4.1 && <0.5)
rejecting: transformers-0.1.0.0 (conflict: optparse-applicative =>
transformers>=0.2 && <0.5)
Dependency tree exhaustively searched.