diff --git a/pkgs/development/libraries/haskell/texmath/0.4.nix b/pkgs/development/libraries/haskell/texmath/0.4.nix
new file mode 100644
index 00000000000..825dcc7403f
--- /dev/null
+++ b/pkgs/development/libraries/haskell/texmath/0.4.nix
@@ -0,0 +1,15 @@
+{cabal, parsec, syb, xml} :
+
+cabal.mkDerivation (self : {
+  pname = "texmath";
+  version = "0.4";
+  sha256 = "1rvnhqljxkljy8ncpaj8p7b14nvvm6zmiixv13m1zxlcr457j2ai";
+  propagatedBuildInputs = [ parsec syb xml ];
+  meta = {
+    homepage = "http://github.com/jgm/texmath";
+    description = "Conversion of LaTeX math formulas to MathML.";
+    license = "GPL";
+    platforms = self.stdenv.lib.platforms.haskellPlatforms;
+    maintainers = [ self.stdenv.lib.maintainers.simons ];
+  };
+})
diff --git a/pkgs/development/libraries/haskell/texmath/default.nix b/pkgs/development/libraries/haskell/texmath/0.5.0.1.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/texmath/default.nix
rename to pkgs/development/libraries/haskell/texmath/0.5.0.1.nix
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index afe9e1bc4fc..7021a1ce31c 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1078,7 +1078,9 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   testpack = callPackage ../development/libraries/haskell/testpack {};
 
-  texmath = callPackage ../development/libraries/haskell/texmath {};
+  texmath_0_4 = callPackage ../development/libraries/haskell/texmath/0.4.nix {};
+  texmath_0_5_0_1 = callPackage ../development/libraries/haskell/texmath/0.5.0.1.nix {};
+  texmath = self.texmath_0_5_0_1;
 
   text_0_11_0_5 = callPackage ../development/libraries/haskell/text/0.11.0.5.nix {};
   text_0_11_0_6 = callPackage ../development/libraries/haskell/text/0.11.0.6.nix {};