diff --git a/pkgs/development/python-modules/ansible/2.1.nix b/pkgs/development/python-modules/ansible/2.1.nix
index 5af0837387d..077bfa198aa 100644
--- a/pkgs/development/python-modules/ansible/2.1.nix
+++ b/pkgs/development/python-modules/ansible/2.1.nix
@@ -10,7 +10,8 @@
 , six
 , netaddr
 , dns
-, pywinrm
+, windowsSupport ? false
+, pywinrm ? null
 }:
 
 let
@@ -43,7 +44,6 @@ in buildPythonPackage rec {
   dontStrip = true;
   dontPatchELF = true;
   dontPatchShebangs = false;
-  windowsSupport = true;
 
   propagatedBuildInputs = [ pycrypto paramiko jinja pyyaml httplib2
     boto six netaddr dns ] ++ lib.optional windowsSupport pywinrm;