diff --git a/pkgs/development/libraries/haskell/regex-posix/0.72.0.3.nix b/pkgs/development/libraries/haskell/regex-posix/0.72.0.3.nix
deleted file mode 100644
index 893e36677011..000000000000
--- a/pkgs/development/libraries/haskell/regex-posix/0.72.0.3.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, regexBase }:
-
-cabal.mkDerivation (self: {
-  pname = "regex-posix";
-  version = "0.72.0.3";
-  sha256 = "327ab87f3d4f5315a9414331eb382b8b997de8836d577c3f7d232c574606feb1";
-  buildDepends = [ regexBase ];
-  meta = {
-    homepage = "http://sourceforge.net/projects/lazy-regex";
-    description = "Replaces/Enhances Text.Regex";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/regex-posix/0.94.1.nix b/pkgs/development/libraries/haskell/regex-posix/0.94.1.nix
deleted file mode 100644
index ec4bdaab4319..000000000000
--- a/pkgs/development/libraries/haskell/regex-posix/0.94.1.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, regexBase }:
-
-cabal.mkDerivation (self: {
-  pname = "regex-posix";
-  version = "0.94.1";
-  sha256 = "63e76de0610d35f1b576ae65a25a38e04e758ed64b9b3512de95bdffd649485c";
-  buildDepends = [ regexBase ];
-  meta = {
-    homepage = "http://sourceforge.net/projects/lazy-regex";
-    description = "Replaces/Enhances Text.Regex";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/regex-posix/0.94.2.nix b/pkgs/development/libraries/haskell/regex-posix/0.94.2.nix
deleted file mode 100644
index 20f2dd714140..000000000000
--- a/pkgs/development/libraries/haskell/regex-posix/0.94.2.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, regexBase }:
-
-cabal.mkDerivation (self: {
-  pname = "regex-posix";
-  version = "0.94.2";
-  sha256 = "ea0c1ed0ab49ade4dba1eea7a42197652ccb18b7a98c4040e37ba11d26f33067";
-  buildDepends = [ regexBase ];
-  meta = {
-    homepage = "http://sourceforge.net/projects/lazy-regex";
-    description = "Replaces/Enhances Text.Regex";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/regex-posix/0.94.4.nix b/pkgs/development/libraries/haskell/regex-posix/0.94.4.nix
deleted file mode 100644
index 49923bf2d6c1..000000000000
--- a/pkgs/development/libraries/haskell/regex-posix/0.94.4.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, regexBase }:
-
-cabal.mkDerivation (self: {
-  pname = "regex-posix";
-  version = "0.94.4";
-  sha256 = "1ykirysvz9ganm2k7fmrppklsgh0h35mjfsi9g1icv43pqpr6ldw";
-  buildDepends = [ regexBase ];
-  meta = {
-    homepage = "http://sourceforge.net/projects/lazy-regex";
-    description = "Replaces/Enhances Text.Regex";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/regex-posix/0.95.1.nix b/pkgs/development/libraries/haskell/regex-posix/0.95.1.nix
deleted file mode 100644
index 0bcc6d260525..000000000000
--- a/pkgs/development/libraries/haskell/regex-posix/0.95.1.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-# This file was auto-generated by cabal2nix. Please do NOT edit manually!
-
-{ cabal, regexBase }:
-
-cabal.mkDerivation (self: {
-  pname = "regex-posix";
-  version = "0.95.1";
-  sha256 = "02pgxwbgz738kpdmsg18xs6kmq6my5hqd9cl4rm7cg2v39di9vbl";
-  buildDepends = [ regexBase ];
-  meta = {
-    homepage = "http://sourceforge.net/projects/lazy-regex";
-    description = "Replaces/Enhances Text.Regex";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    hydraPlatforms = self.stdenv.lib.platforms.none;
-  };
-})
diff --git a/pkgs/development/libraries/haskell/regex-posix/0.95.2.nix b/pkgs/development/libraries/haskell/regex-posix/default.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/regex-posix/0.95.2.nix
rename to pkgs/development/libraries/haskell/regex-posix/default.nix
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index ee2aa19e7733..4c3a986821be 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -2081,13 +2081,7 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   regexPcreBuiltin = callPackage ../development/libraries/haskell/regex-pcre-builtin {};
 
-  regexPosix_0_72_0_3 = callPackage ../development/libraries/haskell/regex-posix/0.72.0.3.nix {};
-  regexPosix_0_94_1 = callPackage ../development/libraries/haskell/regex-posix/0.94.1.nix {};
-  regexPosix_0_94_2 = callPackage ../development/libraries/haskell/regex-posix/0.94.2.nix {};
-  regexPosix_0_94_4 = callPackage ../development/libraries/haskell/regex-posix/0.94.4.nix {};
-  regexPosix_0_95_1 = callPackage ../development/libraries/haskell/regex-posix/0.95.1.nix {};
-  regexPosix_0_95_2 = callPackage ../development/libraries/haskell/regex-posix/0.95.2.nix {};
-  regexPosix = self.regexPosix_0_95_2;
+  regexPosix = callPackage ../development/libraries/haskell/regex-posix {};
 
   regexTdfa = callPackage ../development/libraries/haskell/regex-tdfa {};