diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index 9f8f85b2df0..01b4f2e75ab 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -20,6 +20,7 @@
       haskellPlatform = null;
       binary = null; # now a core package
       extensibleExceptions = self.extensibleExceptions_0_1_1_4;
+      regexCompat = self.regexCompat_0_95_1.override { regexPosix = self.regexPosix_0_95_2; };
     };
 
   ghc741Prefs =
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index b4aeb4bfb3c..b7c14710f5b 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -135,8 +135,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
     QuickCheck   = self.QuickCheck_2_5;         # 7.6 ok
     random       = self.random_1_0_1_1;         # 7.6 ok
     regexBase    = self.regexBase_0_93_2;       # 7.6 ok
-    regexCompat  = self.regexCompat_0_95_1;     # 7.6 fail
-    regexPosix   = self.regexPosix_0_95_1;      # 7.6 fail
+    regexCompat  = self.regexCompat_0_95_1;     # 7.6 ok
+    regexPosix   = self.regexPosix_0_95_2;      # 7.6 ok
     stm          = self.stm_2_4;                # 7.6 ok
     syb          = self.syb_0_3_7;              # 7.6 ok
     text         = self.text_0_11_2_3;          # 7.6 ok