diff --git a/pkgs/development/libraries/haskell/WebBits/2.1.nix b/pkgs/development/libraries/haskell/WebBits/2.1.nix
new file mode 100644
index 00000000000..915ff0b1d60
--- /dev/null
+++ b/pkgs/development/libraries/haskell/WebBits/2.1.nix
@@ -0,0 +1,18 @@
+{ cabal, mtl, parsec, syb }:
+
+cabal.mkDerivation (self: {
+  pname = "WebBits";
+  version = "2.1";
+  sha256 = "18m19fck9zb6jh8bfd47nja1q6ab1jmd0q5r3k8m5674i6273hyn";
+  buildDepends = [ mtl parsec syb ];
+  meta = {
+    homepage = "http://www.cs.brown.edu/research/plt/";
+    description = "JavaScript analysis tools";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = [
+      self.stdenv.lib.maintainers.andres
+      self.stdenv.lib.maintainers.simons
+    ];
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index a93d654b0fa..74bff87bf79 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1299,10 +1299,15 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
   WebBits_2_0 = callPackage ../development/libraries/haskell/WebBits/2.0.nix {
     parsec = self.parsec2;
   };
-  WebBits = self.WebBits_2_0;
+  WebBits_2_1 = callPackage ../development/libraries/haskell/WebBits/2.1.nix {};
+  WebBits = self.WebBits_2_1;
 
-  WebBitsHtml_1_0_1 = callPackage ../development/libraries/haskell/WebBits-Html/1.0.1.nix {};
-  WebBitsHtml_1_0_2 = callPackage ../development/libraries/haskell/WebBits-Html/1.0.2.nix {};
+  WebBitsHtml_1_0_1 = callPackage ../development/libraries/haskell/WebBits-Html/1.0.1.nix {
+    WebBits = self.WebBits_2_0;
+  };
+  WebBitsHtml_1_0_2 = callPackage ../development/libraries/haskell/WebBits-Html/1.0.2.nix {
+    WebBits = self.WebBits_2_0;
+  };
   WebBitsHtml = self.WebBitsHtml_1_0_2;
 
   webRoutes = callPackage ../development/libraries/haskell/web-routes {};