diff --git a/pkgs/development/libraries/haskell/polyparse/1.7.nix b/pkgs/development/libraries/haskell/polyparse/1.7.nix
deleted file mode 100644
index b27dc9cc695..00000000000
--- a/pkgs/development/libraries/haskell/polyparse/1.7.nix
+++ /dev/null
@@ -1,18 +0,0 @@
-{ cabal, text }:
-
-cabal.mkDerivation (self: {
-  pname = "polyparse";
-  version = "1.7";
-  sha256 = "de8ed0ce54f1f81bb0783dd97b7b22eca28df4a238684a26b37c5af2d17a364b";
-  buildDepends = [ text ];
-  meta = {
-    homepage = "http://code.haskell.org/~malcolm/polyparse/";
-    description = "A variety of alternative parser combinator libraries";
-    license = "LGPL";
-    platforms = self.ghc.meta.platforms;
-    maintainers = [
-      self.stdenv.lib.maintainers.andres
-      self.stdenv.lib.maintainers.simons
-    ];
-  };
-})
diff --git a/pkgs/development/libraries/haskell/polyparse/1.8.nix b/pkgs/development/libraries/haskell/polyparse/default.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/polyparse/1.8.nix
rename to pkgs/development/libraries/haskell/polyparse/default.nix
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index c2907c8ee9d..93e44e9b7dd 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1456,9 +1456,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   pgm = callPackage ../development/libraries/haskell/pgm {};
 
-  polyparse_1_7 = callPackage ../development/libraries/haskell/polyparse/1.7.nix {};
-  polyparse_1_8 = callPackage ../development/libraries/haskell/polyparse/1.8.nix {};
-  polyparse = self.polyparse_1_8;
+  polyparse = callPackage ../development/libraries/haskell/polyparse {};
 
   poolConduit = callPackage ../development/libraries/haskell/pool-conduit {};