@@ -902,6 +902,9 @@ executable EchoServer
902902 streamly
903903 , base >= 4.8 && < 5
904904 , network >= 2.6 && < 4
905+ if impl(ghc < 8.0)
906+ build-depends:
907+ transformers >= 0.4 && < 0.6
905908 else
906909 buildable: False
907910
@@ -915,6 +918,9 @@ executable FileSinkServer
915918 streamly
916919 , base >= 4.8 && < 5
917920 , network >= 2.6 && < 4
921+ if impl(ghc < 8.0)
922+ build-depends:
923+ transformers >= 0.4 && < 0.6
918924 else
919925 buildable: False
920926