@@ -262,6 +262,8 @@ defaultConfiguration = Configuration
262262 , "primitive < 0.6" -- newer versions break lens and others packages
263263 , "QuickCheck < 2.8" -- 2.8 breaks chell-quickcheck-0.2.4
264264 , "semigroupoids >=4 && <4.5" -- newer versions break profunctors-4.4.1
265+ , "bifunctors == 4.*" -- newer versions break lens-4.9.1
266+ , "profunctors ==4.*" -- newer versions break lens-4.9.1
265267 , "utf8-string < 1" -- version 1 breaks several packages right now, most notably hint
266268 , "zlib < 0.6" -- newer versions break cabal-install
267269 ]