diff --git a/pkgs/development/python-modules/bokeh/default.nix b/pkgs/development/python-modules/bokeh/default.nix
index 43c176a09ec..a1ae95e6d5d 100644
--- a/pkgs/development/python-modules/bokeh/default.nix
+++ b/pkgs/development/python-modules/bokeh/default.nix
@@ -34,11 +34,11 @@
 buildPythonPackage rec {
   pname = "bokeh";
   name = "${pname}${version}";
-  version = "0.12.7";
+  version = "0.12.9";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2c42c95bf1a418c758dbff8446b4f5e5fc72ac10ea5da4e6b5010067396d0880";
+    sha256 = "00jx3yycy6fziihz45hwj1dsh520h3vmypp28mw0877rxpxl2yxg";
   };
 
   disabled = isPyPy;
@@ -79,4 +79,4 @@ buildPythonPackage rec {
     homepage = "http://github.com/bokeh/bokeh";
     license = lib.licenses.bsd3;
   };
-}
\ No newline at end of file
+}
diff --git a/pkgs/development/python-modules/xarray/default.nix b/pkgs/development/python-modules/xarray/default.nix
index 7b9712dfd02..1215e613f6f 100644
--- a/pkgs/development/python-modules/xarray/default.nix
+++ b/pkgs/development/python-modules/xarray/default.nix
@@ -5,6 +5,7 @@
 , numpy
 , pandas
 , python
+, fetchurl
 }:
 
 buildPythonPackage rec {
@@ -17,6 +18,15 @@ buildPythonPackage rec {
     sha256 = "f649a41d43b5a6c64bdcbd57e994932656b689f9593a86dd0be95778a2b47494";
   };
 
+  # Temporary patch until next release (later than 0.9.6) to fix
+  # a broken test case.
+  patches = [
+    (fetchurl {
+      url = "https://github.com/pydata/xarray/commit/726c6a3638ecf95889c541d84e892a106c2f2f92.patch";
+      sha256 = "1i2hsj5v5qlvqfj48vyn9931yndsf4k4wrk3qpqpywh32s7r007b";
+    })
+  ];
+
   buildInputs = [ pytest ];
   propagatedBuildInputs = [numpy pandas];