Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: transformers-compat (user goal)
rejecting: transformers-compat-0.6.0.6, transformers-compat-0.6.0.5,
transformers-compat-0.6.0.4 (constraint from user target requires ==0.6.0.3)
trying: transformers-compat-0.6.0.3
trying: base-4.10.1.0/installed-4.1... (dependency of
transformers-compat-0.6.0.3)
trying: transformers-compat-0.6.0.3:-two
trying: transformers-compat-0.6.0.3:+three
trying: transformers-compat-0.6.0.3:+mtl
trying: transformers-compat-0.6.0.3:-five
trying: transformers-compat-0.6.0.3:-four
next goal: transformers (dependency of transformers-compat-0.6.0.3)
rejecting: transformers-0.5.2.0/installed-0.5... (conflict:
transformers-compat-0.6.0.3:five => transformers>=0.4 && <0.5 || >=0.3 && <0.4
|| >=0.2 && <0.3 || >=0.5.3 && <0.6)
rejecting: transformers-0.5.5.0, transformers-0.5.4.0 (conflict:
transformers-compat-0.6.0.3:four => transformers>=0.3 && <0.4)
rejecting: transformers-0.5.2.0, transformers-0.5.1.0, transformers-0.5.0.1,
transformers-0.5.0.0 (conflict: transformers-compat-0.6.0.3:five =>
transformers>=0.4 && <0.5 || >=0.3 && <0.4 || >=0.2 && <0.3 || >=0.5.3 &&
<0.6)
rejecting: transformers-0.4.3.0, transformers-0.4.2.0, transformers-0.4.1.0
(conflict: transformers-compat-0.6.0.3:four => transformers>=0.3 && <0.4 ||
>=0.2 && <0.3 || >=0.5.3 && <0.6)
rejecting: transformers-0.3.0.0 (conflict: base==4.10.1.0/installed-4.1...,
transformers => base>=2 && <4.8 || >=1.0 && <2)
rejecting: transformers-0.2.2.1, transformers-0.2.1.0, transformers-0.2.0.0
(conflict: transformers-compat-0.6.0.3:four => transformers>=0.3 && <0.4)
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 (conflict:
transformers-compat => transformers>=0.5 && <0.5.3 || >=0.4 && <0.5 || >=0.3
&& <0.4 || >=0.2 && <0.3 || >=0.5.3 && <0.6)
rejecting: transformers-0.5.3.1, transformers-0.5.3.0 (conflict:
transformers-compat-0.6.0.3:four => transformers>=0.3 && <0.4)
rejecting: transformers-0.5.0.2 (conflict: transformers-compat-0.6.0.3:five =>
transformers>=0.4 && <0.5 || >=0.3 && <0.4 || >=0.2 && <0.3 || >=0.5.3 &&
<0.6)
rejecting: transformers-0.4.0.0 (conflict: transformers-compat-0.6.0.3:four =>
transformers>=0.3 && <0.4 || >=0.2 && <0.3 || >=0.5.3 && <0.6)
rejecting: transformers-0.2.2.0 (conflict: transformers-compat-0.6.0.3:four =>
transformers>=0.3 && <0.4)
rejecting: transformers-0.1.0.0 (conflict: transformers-compat =>
transformers>=0.5 && <0.5.3 || >=0.4 && <0.5 || >=0.3 && <0.4 || >=0.2 && <0.3
|| >=0.5.3 && <0.6)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: transformers-compat,
transformers-compat-0.6.0.3:flag, base, transformers