diff --git a/pkgs/development/python-modules/ecpy/default.nix b/pkgs/development/python-modules/ecpy/default.nix
index 97f04828300b..df843ed7c32e 100644
--- a/pkgs/development/python-modules/ecpy/default.nix
+++ b/pkgs/development/python-modules/ecpy/default.nix
@@ -1,21 +1,20 @@
-{ stdenv, fetchPypi, buildPythonPackage, isPy3k, hidapi
-, pycrypto, pillow, protobuf, future
-}:
+{ lib, fetchPypi, buildPythonPackage, isPy3k, future }:
 
 buildPythonPackage rec {
   pname = "ECPy";
-  version = "0.9.0";
-
-  disabled = !isPy3k;
+  version = "0.9.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "ef41346ae24789699f3bc3ddefbfac03ad6b73b7d3d19b998ba9ce47b67c7277";
+    sha256 = "f0df66be67f3de0152dfb3c453f4247bdfa2b4e37aa75b98617a637376032229";
   };
 
-  buildInputs = [ hidapi pycrypto pillow protobuf future ];
+  propagatedBuildInputs = lib.optional (!isPy3k) future;
 
-  meta = with stdenv.lib; {
+  # No tests implemented
+  doCheck = false;
+
+  meta = with lib; {
     description = "Pure Pyhton Elliptic Curve Library";
     homepage = https://github.com/ubinity/ECPy;
     license = licenses.asl20;