libghc-microlens-th-dev 0.4.3.5-1build1 (amd64 binary) in ubuntu groovy

 This package lets you automatically generate lenses for data types; code was
 extracted from the lens package, and therefore generated lenses are fully
 compatible with ones generated by lens (and can be used both from lens and
 microlens).
 .
 This package is a part of the microlens family.
 .
 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.