diff --git a/pkgs/development/python-modules/sip/4.16.nix b/pkgs/development/python-modules/sip/4.16.nix
index adb6c7ef80d6..2861816885f3 100644
--- a/pkgs/development/python-modules/sip/4.16.nix
+++ b/pkgs/development/python-modules/sip/4.16.nix
@@ -16,6 +16,8 @@ if isPyPy then throw "sip not supported for interpreter ${python.executable}" el
 
   buildInputs = [ python ];
 
+  passthru.pythonPath = [];
+
   meta = with stdenv.lib; {
     description = "Creates C++ bindings for Python modules";
     homepage    = "http://www.riverbankcomputing.co.uk/";
diff --git a/pkgs/development/python-modules/sip/default.nix b/pkgs/development/python-modules/sip/default.nix
index cf3a0149844b..6c455b3bb1bd 100644
--- a/pkgs/development/python-modules/sip/default.nix
+++ b/pkgs/development/python-modules/sip/default.nix
@@ -19,6 +19,8 @@ if isPyPy then throw "sip not supported for interpreter ${python.executable}" el
 
   buildInputs = [ python ];
 
+  passthru.pythonPath = [];
+
   meta = with stdenv.lib; {
     description = "Creates C++ bindings for Python modules";
     homepage    = "http://www.riverbankcomputing.co.uk/";