diff --git a/pkgs/development/haskell-modules/configuration-ghc-6.12.x.nix b/pkgs/development/haskell-modules/configuration-ghc-6.12.x.nix
index a47789e31408..9329a2c2318f 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-6.12.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-6.12.x.nix
@@ -79,4 +79,7 @@ self: super: {
   stm = addBuildTool super.stm self.Cabal_1_18_1_6;
   split = super.split_0_1_4_3;
 
+  # Needs hashable on pre 7.10.x compilers.
+  nats = addBuildDepend super.nats self.hashable;
+
 }
diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.0.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.0.x.nix
index ae8ad42915f3..caef6c4b7546 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.0.x.nix
@@ -61,4 +61,7 @@ self: super: {
   # Setup: Can't find transitive deps for haddock
   doctest = dontHaddock super.doctest;
 
+  # Needs hashable on pre 7.10.x compilers.
+  nats = addBuildDepend super.nats self.hashable;
+
 }
diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.2.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.2.x.nix
index 622cea62abb2..df9f96f73e75 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.2.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.2.x.nix
@@ -61,4 +61,7 @@ self: super: {
   # Setup: Can't find transitive deps for haddock
   doctest = dontHaddock super.doctest;
 
+  # Needs hashable on pre 7.10.x compilers.
+  nats = addBuildDepend super.nats self.hashable;
+
 }
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 a0eb2724074c..53bcff9dc2fd 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.4.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.4.x.nix
@@ -67,4 +67,7 @@ self: super: {
   # Newer versions require a more recent compiler.
   control-monad-free = super.control-monad-free_0_5_3;
 
+  # Needs hashable on pre 7.10.x compilers.
+  nats = addBuildDepend super.nats self.hashable;
+
 }
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 d23bc99810a3..235a165d2cde 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix
@@ -74,4 +74,7 @@ self: super: {
   # Newer versions require a more recent compiler.
   control-monad-free = super.control-monad-free_0_5_3;
 
+  # Needs hashable on pre 7.10.x compilers.
+  nats = addBuildDepend super.nats self.hashable;
+
 }