diff --git a/pkgs/development/libraries/haskell/parsec/2.1.0.1.nix b/pkgs/development/libraries/haskell/parsec/2.1.0.1.nix
deleted file mode 100644
index 458a2bd2977..00000000000
--- a/pkgs/development/libraries/haskell/parsec/2.1.0.1.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal }:
-
-cabal.mkDerivation (self: {
-  pname = "parsec";
-  version = "2.1.0.1";
-  sha256 = "2d85e5b5c8b2b1f341037ce67e1db7fa47b31c083136796cfef9e5b945c656df";
-  meta = {
-    homepage = "http://www.cs.uu.nl/~daan/parsec.html";
-    description = "Monadic parser combinators";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/parsec/3.1.1.nix b/pkgs/development/libraries/haskell/parsec/3.1.1.nix
deleted file mode 100644
index e997acd4b49..00000000000
--- a/pkgs/development/libraries/haskell/parsec/3.1.1.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, mtl }:
-
-cabal.mkDerivation (self: {
-  pname = "parsec";
-  version = "3.1.1";
-  sha256 = "0x34gwn9k68h69c3hw7yaah6zpdwq8hvqss27f3n4n4cp7dh81fk";
-  buildDepends = [ mtl ];
-  meta = {
-    homepage = "http://www.cs.uu.nl/~daan/parsec.html";
-    description = "Monadic parser combinators";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/parsec/3.1.2.nix b/pkgs/development/libraries/haskell/parsec/3.1.2.nix
deleted file mode 100644
index dd55106fa0d..00000000000
--- a/pkgs/development/libraries/haskell/parsec/3.1.2.nix
+++ /dev/null
@@ -1,18 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, mtl, text }:
-
-cabal.mkDerivation (self: {
-  pname = "parsec";
-  version = "3.1.2";
-  sha256 = "0lhn9j2j5jlh7g0qx9f6ms63n9x1xlxg9isdvm6z0ksy3ywj9wch";
-  buildDepends = [ mtl text ];
-  jailbreak = true;
-  meta = {
-    homepage = "http://www.cs.uu.nl/~daan/parsec.html";
-    description = "Monadic parser combinators";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/parsec/3.1.3.nix b/pkgs/development/libraries/haskell/parsec/3.1.3.nix
deleted file mode 100644
index 3e81947cfed..00000000000
--- a/pkgs/development/libraries/haskell/parsec/3.1.3.nix
+++ /dev/null
@@ -1,18 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, mtl, text }:
-
-cabal.mkDerivation (self: {
-  pname = "parsec";
-  version = "3.1.3";
-  sha256 = "1a64gzirgpa1i78gbbp9z059nh29xmcja4g8vgjb1fbylx6vn54z";
-  buildDepends = [ mtl text ];
-  jailbreak = true;
-  meta = {
-    homepage = "http://www.cs.uu.nl/~daan/parsec.html";
-    description = "Monadic parser combinators";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/parsec/3.1.7.nix b/pkgs/development/libraries/haskell/parsec/default.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/parsec/3.1.7.nix
rename to pkgs/development/libraries/haskell/parsec/default.nix
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index d43a2c2af8c..680642c037b 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1847,12 +1847,7 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   parseargs = callPackage ../development/libraries/haskell/parseargs {};
 
-  parsec_2_1_0_1 = callPackage ../development/libraries/haskell/parsec/2.1.0.1.nix {};
-  parsec_3_1_1   = callPackage ../development/libraries/haskell/parsec/3.1.1.nix {};
-  parsec_3_1_2   = callPackage ../development/libraries/haskell/parsec/3.1.2.nix {};
-  parsec_3_1_3   = callPackage ../development/libraries/haskell/parsec/3.1.3.nix {};
-  parsec_3_1_7   = callPackage ../development/libraries/haskell/parsec/3.1.7.nix {};
-  parsec = self.parsec_3_1_7;
+  parsec = callPackage ../development/libraries/haskell/parsec {};
 
   parsers = callPackage ../development/libraries/haskell/parsers {};