diff --git a/pkgs/development/libraries/haskell/parallel/1.1.0.1.nix b/pkgs/development/libraries/haskell/parallel/1.1.0.1.nix
deleted file mode 100644
index 99575921cc6..00000000000
--- a/pkgs/development/libraries/haskell/parallel/1.1.0.1.nix
+++ /dev/null
@@ -1,15 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal }:
-
-cabal.mkDerivation (self: {
-  pname = "parallel";
-  version = "1.1.0.1";
-  sha256 = "0885086660268f3626effacb29a02b5c81f3e5a8dfa99dabe0981ddbc407999f";
-  meta = {
-    description = "parallel programming library";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/parallel/2.2.0.1.nix b/pkgs/development/libraries/haskell/parallel/2.2.0.1.nix
deleted file mode 100644
index 52a5d3c3c33..00000000000
--- a/pkgs/development/libraries/haskell/parallel/2.2.0.1.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, deepseq }:
-
-cabal.mkDerivation (self: {
-  pname = "parallel";
-  version = "2.2.0.1";
-  sha256 = "255310023138ecf618c8b450203fa2fc65feb68cd08ee4d369ceae72054168fd";
-  buildDepends = [ deepseq ];
-  meta = {
-    description = "Parallel programming library";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/parallel/3.1.0.1.nix b/pkgs/development/libraries/haskell/parallel/3.1.0.1.nix
deleted file mode 100644
index 095603717b7..00000000000
--- a/pkgs/development/libraries/haskell/parallel/3.1.0.1.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, deepseq }:
-
-cabal.mkDerivation (self: {
-  pname = "parallel";
-  version = "3.1.0.1";
-  sha256 = "0j03i5467iyz98fl4fnzlwrr93j2as733kbrxnlcgyh455kb89ns";
-  buildDepends = [ deepseq ];
-  meta = {
-    description = "Parallel programming library";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/parallel/3.2.0.2.nix b/pkgs/development/libraries/haskell/parallel/3.2.0.2.nix
deleted file mode 100644
index f881e2f83c7..00000000000
--- a/pkgs/development/libraries/haskell/parallel/3.2.0.2.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, deepseq }:
-
-cabal.mkDerivation (self: {
-  pname = "parallel";
-  version = "3.2.0.2";
-  sha256 = "0sy67cdbwh17wng6b77h9hnkg59mgnyilwvirihmq9535jm9yml2";
-  buildDepends = [ deepseq ];
-  meta = {
-    description = "Parallel programming library";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 3029fd4cd9d..d43a2c2af8c 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1839,10 +1839,6 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
   };
   pango = self.pango_0_13_0_3;
 
-  parallel_1_1_0_1 = callPackage ../development/libraries/haskell/parallel/1.1.0.1.nix {};
-  parallel_2_2_0_1 = callPackage ../development/libraries/haskell/parallel/2.2.0.1.nix {};
-  parallel_3_1_0_1 = callPackage ../development/libraries/haskell/parallel/3.1.0.1.nix {};
-  parallel_3_2_0_2 = callPackage ../development/libraries/haskell/parallel/3.2.0.2.nix {};
   parallel_3_2_0_3 = callPackage ../development/libraries/haskell/parallel/3.2.0.3.nix {};
   parallel_3_2_0_4 = callPackage ../development/libraries/haskell/parallel/3.2.0.4.nix {};
   parallel = self.parallel_3_2_0_4;