constraints: array ==0.5.1.0,
             attoparsec ==0.13.0.0,
             base ==4.8.0.0,
             base-unicode-symbols ==0.2.2.4,
             binary ==0.7.3.0,
             blaze-builder ==0.4.0.1,
             bytestring ==0.10.6.0,
             case-insensitive ==1.2.0.4,
             charset ==0.3.7.1,
             containers ==0.5.6.2,
             deepseq ==1.4.1.1,
             ghc-prim ==0.4.0.0,
             hashable ==1.2.3.2,
             http-types ==0.8.6,
             integer-gmp ==1.0.0.0,
             mtl ==2.2.1,
             nats ==1,
             network ==2.6.1.0,
             parsec ==3.1.9,
             parsers ==0.12.2.1,
             rts ==1.0,
             scientific ==0.3.3.8,
             semigroups ==0.16.2.2,
             text ==1.2.1.0,
             time ==1.5.0.1,
             transformers ==0.4.2.0,
             unix ==2.7.1.0,
             unordered-containers ==0.2.5.1,
             vault ==0.3.0.4,
             wai ==3.0.2.3