Cabal install fails due to transformers transformers==0.4.* dependency

[Former user]

A fresh install seems to use transformers-0.5.5.0 which clashes with the transformers==0.4.* requirement. Can this be fixed? Thanks.

~/riff$ cabal install riff
Resolving dependencies...
cabal: Could not resolve dependencies:
trying: riff-0.3.0.1 (user goal)
trying: base-4.9.1.0/installed-4.9... (dependency of riff-0.3.0.1)
next goal: transformers (dependency of riff-0.3.0.1)
rejecting: transformers-0.5.2.0/installed-0.5..., transformers-0.5.5.0,
transformers-0.5.4.0, transformers-0.5.2.0, transformers-0.5.1.0,
transformers-0.5.0.1, transformers-0.5.0.0 (conflict: riff =>
transformers==0.4.*)
rejecting: transformers-0.4.3.0, transformers-0.4.2.0 (conflict:
base==4.9.1.0/installed-4.9..., transformers => base>=2 && <4.9)
rejecting: transformers-0.4.1.0 (conflict: base==4.9.1.0/installed-4.9...,
transformers => base>=2 && <4.8 || >=1.0 && <2)
rejecting: transformers-0.3.0.0, transformers-0.2.2.1, transformers-0.2.1.0,
transformers-0.2.0.0, 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-0.5.3.1, transformers-0.5.3.0,
transformers-0.5.0.2 (conflict: riff => transformers==0.4.*)
rejecting: transformers-0.4.0.0 (conflict: base==4.9.1.0/installed-4.9...,
transformers => base>=2 && <4.8 || >=1.0 && <2)
rejecting: transformers-0.2.2.0, transformers-0.1.0.0 (conflict: riff =>
transformers==0.4.*)
Dependency tree exhaustively searched.