diff --git a/pkgs/development/python-modules/pyqt/4.x.nix b/pkgs/development/python-modules/pyqt/4.x.nix
index 31294c8dc98d..b2d5b93d9f78 100644
--- a/pkgs/development/python-modules/pyqt/4.x.nix
+++ b/pkgs/development/python-modules/pyqt/4.x.nix
@@ -40,6 +40,8 @@ stdenv.mkDerivation {
 
   enableParallelBuilding = true;
 
+  passthru.pythonPath = [];
+
   meta = {
     description = "Python bindings for Qt";
     license = "GPL";
diff --git a/pkgs/development/python-modules/pyqt/5.x.nix b/pkgs/development/python-modules/pyqt/5.x.nix
index 0e5f5604a988..71fb5cb36570 100644
--- a/pkgs/development/python-modules/pyqt/5.x.nix
+++ b/pkgs/development/python-modules/pyqt/5.x.nix
@@ -53,4 +53,6 @@ in stdenv.mkDerivation {
   '';
 
   enableParallelBuilding = true;
+
+  passthru.pythonPath = [];
 }