haskell-network: use older version to compile with GHC 7.4.x and before

Recent versions of network no longer support base libraries that old.

pkgs/development/haskell-modules/configuration-ghc-7.0.x.nix

@@ -80,4 +80,8 @@ self: super: {
   # Needs nats on pre 7.6.x compilers.
   semigroups = addBuildDepend super.semigroups self.nats;
 
+  # Newer versions don't compile any longer.
+  network_2_6_3_1 = dontCheck super.network_2_6_3_1;
+  network = self.network_2_6_3_1;
+
 }

pkgs/development/haskell-modules/configuration-ghc-7.2.x.nix

@@ -78,4 +78,8 @@ self: super: {
   semigroups = addBuildDepend super.semigroups self.nats;
   optparse-applicative = addBuildDepend super.optparse-applicative self.semigroups;
 
+  # Newer versions don't compile any longer.
+  network_2_6_3_1 = dontCheck super.network_2_6_3_1;
+  network = self.network_2_6_3_1;
+
 }

pkgs/development/haskell-modules/configuration-ghc-7.4.x.nix

@@ -102,4 +102,8 @@ self: super: {
   QuickCheck = addBuildDepends super.QuickCheck (with self; [nats semigroups]);
   optparse-applicative = addBuildDepend super.optparse-applicative self.semigroups;
 
+  # Newer versions don't compile any longer.
+  network_2_6_3_1 = dontCheck super.network_2_6_3_1;
+  network = self.network_2_6_3_1;
+
 }

pkgs/development/haskell-modules/configuration-hackage2nix.yaml

@@ -2449,6 +2449,7 @@ extra-packages:
   - hpack < 0.18                        # required by stack-1.4.0
   - mtl < 2.2                           # newer versions require transformers > 0.4.x, which we cannot provide in GHC 7.8.x
   - mtl-prelude < 2                     # required for to build postgrest on mtl 2.1.x platforms
+  - network == 2.6.3.1                  # newer versions don't compile with GHC 7.4.x and below
   - parallel == 3.2.0.3                 # newer versions don't work with GHC 6.12.3
   - primitive == 0.5.1.*                # required to build alex with GHC 6.12.3
   - QuickCheck < 2                      # required by test-framework-quickcheck and its users