diff --git a/pkgs/development/python-modules/openapi-spec-validator/default.nix b/pkgs/development/python-modules/openapi-spec-validator/default.nix
index 02664326685..160427db7f1 100644
--- a/pkgs/development/python-modules/openapi-spec-validator/default.nix
+++ b/pkgs/development/python-modules/openapi-spec-validator/default.nix
@@ -1,6 +1,6 @@
 { lib, buildPythonPackage, isPy27, fetchPypi
 , jsonschema, pyyaml, six, pathlib
-, mock, pytest, pytestcov, pytest-flake8, tox }:
+, mock, pytest, pytestcov, pytest-flake8, tox, setuptools }:
 
 buildPythonPackage rec {
   pname = "openapi-spec-validator";
@@ -11,7 +11,7 @@ buildPythonPackage rec {
     sha256 = "1kav0jlgdpgwx4am09ja7cr8s1g8h8a7j8mcfy1cfjr8fficg2g4";
   };
 
-  propagatedBuildInputs = [ jsonschema pyyaml six ]
+  propagatedBuildInputs = [ jsonschema pyyaml six setuptools ]
     ++ (lib.optionals (isPy27) [ pathlib ]);
 
   checkInputs = [ mock pytest pytestcov pytest-flake8 tox ];