Use CPP

.gitignore

@@ -4,3 +4,4 @@ samples/
 test-servers/
 /doc/
 .stack-work/
+dist-newstyle/

servant-quickcheck.cabal

@@ -106,7 +106,7 @@ test-suite spec
                      , servant-client
                      , servant
                      , servant-blaze
-                     , transformers
+                     -- , transformers
                      , QuickCheck
                      , quickcheck-io
   default-extensions:  TypeOperators

src/Servant/QuickCheck/Internal/HasGenRequest.hs

@@ -15,6 +15,10 @@ import Servant.API.ContentTypes (AllMimeRender (..))
 import Servant.Client           (BaseUrl (..), Scheme (..))
 import Test.QuickCheck          (Arbitrary (..), Gen, elements, frequency)
 
+#if __GLASGOW_HASKELL__ <= 800
+import Data.Monoid ((<>))
+#endif
+
 import qualified Data.ByteString as BS
 import qualified Data.ByteString.Internal as BS (c2w)
 

src/Servant/QuickCheck/Internal/QuickCheck.hs

@@ -19,6 +19,10 @@ import           Test.QuickCheck.Monadic  (assert, forAllM, monadicIO, monitor,
                                            run)
 import           Test.QuickCheck.Property (counterexample)
 
+#if __GLASGOW_HASKELL__ <= 800
+import Data.Monoid ((<>))
+#endif
+
 import Servant.QuickCheck.Internal.Equality
 import Servant.QuickCheck.Internal.ErrorTypes
 import Servant.QuickCheck.Internal.HasGenRequest