haskell-streaming-commons: fix build on older GHC versions by way of bytestring-builder

1 files changed, 6 insertions, 0 deletions

diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.4.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.4.x.nix
index 46661b56d6b8..d928943fed3c 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.4.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.4.x.nix
@@ -57,4 +57,10 @@ self: super: {
   # The test suite depends on time >=1.4.0.2.
   cookie = dontCheck super.cookie ;
 
+  # bytestring >=0.10.2.0
+  streaming-commons = addBuildTool super.streaming-commons self.bytestring-builder;
+
+  # Choose appropriate flags for our version of 'bytestring'.
+  bytestring-builder = disableCabalFlag super.bytestring-builder "bytestring_has_builder";
+
 }