diff --git a/pkgs/development/python-modules/homeassistant-pyozw/default.nix b/pkgs/development/python-modules/homeassistant-pyozw/default.nix
index 559aa905c2ce..5674db53e5a5 100644
--- a/pkgs/development/python-modules/homeassistant-pyozw/default.nix
+++ b/pkgs/development/python-modules/homeassistant-pyozw/default.nix
@@ -10,5 +10,6 @@ python_openzwave.overridePythonAttrs (oldAttrs: rec {
     sha256 = "2d500638270ee4f0e7e9e114d9b4402c94c232f314116cdcf88d7c1dc9a44427";
   };
 
+  patches = [];
   meta.homepage = https://github.com/home-assistant/python-openzwave;
 })
diff --git a/pkgs/development/python-modules/python_openzwave/cython.patch b/pkgs/development/python-modules/python_openzwave/cython.patch
new file mode 100644
index 000000000000..e01ffdbdc0d0
--- /dev/null
+++ b/pkgs/development/python-modules/python_openzwave/cython.patch
@@ -0,0 +1,20 @@
+diff --git a/pyozw_setup.py b/pyozw_setup.py
+index b201840..37bf2a8 100644
+--- a/pyozw_setup.py
++++ b/pyozw_setup.py
+@@ -257,13 +257,13 @@ class Template(object):
+         if sys.platform.startswith("win"):
+             return ['Cython']
+         else:
+-            return ['Cython==0.28.6']
++            return ['Cython>=0.28.6']
+ 
+     def build_requires(self):
+         if sys.platform.startswith("win"):
+             return ['Cython']
+         else:
+-            return ['Cython==0.28.6']
++            return ['Cython>=0.28.6']
+ 
+     def build(self):
+         if len(self.ctx['extra_objects']) == 1 and os.path.isfile(self.ctx['extra_objects'][0]):
diff --git a/pkgs/development/python-modules/python_openzwave/default.nix b/pkgs/development/python-modules/python_openzwave/default.nix
index ae3f0ba933a7..bb8d236335c4 100644
--- a/pkgs/development/python-modules/python_openzwave/default.nix
+++ b/pkgs/development/python-modules/python_openzwave/default.nix
@@ -1,6 +1,6 @@
 { stdenv, buildPythonPackage, fetchPypi, isPy3k
 , pkgconfig
-, systemd, libyaml, openzwave, cython
+, systemd, libyaml, openzwave, cython, pyserial
 , six, pydispatcher, urwid }:
 
 buildPythonPackage rec {
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ systemd libyaml openzwave cython ];
-  propagatedBuildInputs = [ six urwid pydispatcher ];
+  propagatedBuildInputs = [ six urwid pydispatcher pyserial ];
 
   # primary location for the .xml files is in /etc/openzwave so we override the
   # /usr/local/etc lookup instead as that allows us to dump new .xml files into
@@ -27,6 +27,8 @@ buildPythonPackage rec {
       --replace /usr/local/etc/openzwave ${openzwave}/etc/openzwave
   '';
 
+  patches = [ ./cython.patch ];
+
   # no tests available
   doCheck = false;