diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 3dc84c72c45e..f0d6b6f195e6 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2719,6 +2719,24 @@ let
       license = "BSD-style";
     };
   });
+  
+  dask = buildPythonPackage rec {
+    name = "dask-${version}";
+    version = "0.7.0";
+    
+    src = pkgs.fetchurl {
+      url = "https://pypi.python.org/packages/source/d/dask/${name}.tar.gz";
+      sha256 = "3b48646e9e66ec21a6885700d39ea90e2c2a7ad5d26773a8413b570eb1a67b3e";
+    };
+    
+    propagatedBuildInputs = with self; [numpy toolz dill];
+    
+    meta = {
+      description = "Minimal task scheduling abstraction";
+      homepage = "http://github.com/ContinuumIO/dask/";
+      licenses = licenses.bsd3;
+    };
+  };
 
   datashape = buildPythonPackage rec {
     name = "datashape-${version}";
@@ -2946,6 +2964,24 @@ let
       license = licenses.mit;
     };
   };
+  
+  dill = buildPythonPackage rec {
+    name = "dill-${version}";
+    version = "0.2.4";
+    
+    src = pkgs.fetchurl {
+      url = "https://pypi.python.org/packages/source/d/dill/${name}.tgz";
+      sha256 = "deca57da33ad2121ab1b9c4493bf8eb2b3a72b6426d4b9a3a853a073c68b97ca";
+    };
+    
+    propagatedBuildInputs = with self; [objgraph];
+    
+    meta = {
+      description = "Serialize all of python (almost)";
+      homepage = http://www.cacr.caltech.edu/~mmckerns/dill.htm;
+      license = licenses.bsd3;
+    };
+  };
 
   discogs_client = buildPythonPackage rec {
     name = "discogs-client-2.0.2";
@@ -8874,6 +8910,27 @@ let
       maintainers = with maintainers; [ phreedom thoughtpolice ];
     };
   });
+  
+  objgraph = buildPythonPackage rec {
+    name = "objgraph-${version}";
+    version = "2.0.1";
+    
+    src = pkgs.fetchurl {
+      url = "https://pypi.python.org/packages/source/o/objgraph/${name}.tar.gz";
+      sha256 = "841de52715774ec1d0e97d9b4462d6e3e10406155f9b61f54ba7db984c45442a";
+    };
+    
+    # Tests fail with PyPy.
+    disabled = isPyPy;
+    
+    propagatedBuildInputs = with self; [pkgs.graphviz];
+    
+    meta = {
+      description = "Draws Python object reference graphs with graphviz";
+      homepage = http://mg.pov.lt/objgraph/;
+      license = licenses.mit;
+    };
+  };
 
   odo = buildPythonPackage rec {
     name = "odo-${version}";