Cabal revisions of pipes-concurrency-1.2.1

Hackage metadata revisions edit the .cabal file after upload; each diff below is one revision.

 Name: pipes-concurrency
 Version: 1.2.1
+x-revision: 1
 Cabal-Version: >=1.8.0.2
 Build-Type: Simple
 License: BSD3
 
 Library
     Build-Depends:
-        base         >= 4       && < 5  ,
+        base         >= 4       && < 4.11,
         pipes        >= 3.0     && < 3.4,
         stm          >= 2.4     && < 2.5
     Exposed-Modules: