diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix
index 50f9585f5059..a9c2bb609ae8 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix
@@ -76,4 +76,8 @@ self: super: {
   # Needs hashable on pre 7.10.x compilers.
   nats = addBuildDepend super.nats self.hashable;
 
+  # Ugly hack that triggers a re-build to get rid of the broken version served
+  # by Hydra: http://hydra.cryp.to/build/794276/nixlog/41/raw.
+  void = appendConfigureFlag super.void "-fignore-me-3";
+
 }
diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
index caa4882accba..fb95a3c2833b 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
@@ -134,6 +134,6 @@ self: super: {
 
   # Ugly hack that triggers a re-build to get rid of the broken version served
   # by Hydra: http://hydra.cryp.to/build/794273/nixlog/98/raw.
-  void = appendConfigureFlag super.void "-fignore-me";
+  void = appendConfigureFlag super.void "-fignore-me-3";
 
 }