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The current version dependancy on base is too strict for ghc-7.2.1-rc1's bundled base-22.214.171.124 library, the following patch fixes the stable branch's network-126.96.36.199
diff --git a/network.cabal b/network.cabal
index 3901886..a44c24d 100644
@@ -39,7 +39,7 @@ library
- base >= 3 && < 4.4,
+ base >= 3 && < 4.5,
bytestring < 1.0,
parsec >= 2.0 && < 3.2
Looks like f0bd712 fixed this, so this issue can be closed (I don't have permission to do so).
For the record, network-188.8.131.52 is the first version after 184.108.40.206 that was compatible with GHC 7.2