diff --git a/pkgs/tools/networking/urlwatch/default.nix b/pkgs/tools/networking/urlwatch/default.nix
index 4843f07c8f2..1be71942e70 100644
--- a/pkgs/tools/networking/urlwatch/default.nix
+++ b/pkgs/tools/networking/urlwatch/default.nix
@@ -12,6 +12,10 @@ python3Packages.buildPythonPackage rec {
     ./convert-to-python3.sh
   '';
 
+  postFixup = ''
+    wrapProgram "$out/bin/urlwatch" --prefix "PYTHONPATH" : "$PYTHONPATH"
+  '';
+
   meta = {
     description = "A tool for monitoring webpages for updates";
     homepage = https://thp.io/2008/urlwatch/;