diff --git a/pkgs/applications/misc/onboard/default.nix b/pkgs/applications/misc/onboard/default.nix
index 19875751443..fba1c0b0f5f 100644
--- a/pkgs/applications/misc/onboard/default.nix
+++ b/pkgs/applications/misc/onboard/default.nix
@@ -80,7 +80,7 @@ python3.pkgs.buildPythonApplication rec {
     xorg.libxkbfile
   ] ++ lib.optional atspiSupport at-spi2-core;
 
-  propagatedBuildInputs = with python3.pkgs; [
+  pythonPath = with python3.pkgs; [
     dbus-python
     distutils_extra
     pyatspi