{ mkDerivation, array, base, base-orphans, bifunctors, bytestring , Cabal, cabal-doctest, call-stack, comonad, containers , contravariant, criterion, deepseq, directory, distributive , doctest, exceptions, filepath, free, generic-deriving, ghc-prim , hashable, HUnit, kan-extensions, mtl, nats, parallel, profunctors , QuickCheck, reflection, semigroupoids, semigroups, simple-reflect , stdenv, tagged, template-haskell, test-framework , test-framework-hunit, test-framework-quickcheck2 , test-framework-th, text, th-abstraction, transformers , transformers-compat, unordered-containers, vector, void }: mkDerivation { pname = "lens"; version = "4.15.4"; sha256 = "deadbeef"; setupHaskellDepends = [ base Cabal cabal-doctest filepath ]; libraryHaskellDepends = [ array base base-orphans bifunctors bytestring call-stack comonad containers contravariant distributive exceptions filepath free ghc-prim hashable kan-extensions mtl parallel profunctors reflection semigroupoids semigroups tagged template-haskell text th-abstraction transformers transformers-compat unordered-containers vector void ]; testHaskellDepends = [ base bytestring containers deepseq directory doctest filepath generic-deriving HUnit mtl nats parallel QuickCheck semigroups simple-reflect test-framework test-framework-hunit test-framework-quickcheck2 test-framework-th text transformers unordered-containers vector ]; benchmarkHaskellDepends = [ base bytestring comonad containers criterion deepseq generic-deriving transformers unordered-containers vector ]; homepage = "http://github.com/ekmett/lens/"; description = "Lenses, Folds and Traversals"; license = stdenv.lib.licenses.bsd2; }