diff --git a/pkgs/applications/misc/sigal/default.nix b/pkgs/applications/misc/sigal/default.nix
index bc48ce3e2afc..8289cc428db3 100644
--- a/pkgs/applications/misc/sigal/default.nix
+++ b/pkgs/applications/misc/sigal/default.nix
@@ -28,6 +28,8 @@ python3.pkgs.buildPythonApplication rec {
     feedgenerator
     zopfli
     cryptography
+
+    setuptools # needs pkg_resources
   ];
 
   checkInputs = [