Depend on setuptools in runtime

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

rust-packaging.spec

@@ -4,7 +4,7 @@
 
 Name:           rust-packaging
 Version:        10
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        RPM macros for building Rust packages on various architectures
 
 License:        MIT
@@ -36,6 +36,8 @@ BuildRequires:  cargo
 BuildRequires:  python3dist(semantic-version)
 %endif
 Requires:       cargo
+# pkg_resources due to entry_points
+Requires:       python3dist(setuptools)
 Provides:       rust2rpm = %{version}-%{release}
 %{?python_provide:%python_provide python3-rust2rpm}
 
@@ -72,6 +74,9 @@ py.test-%{python3_version} -vv test.py
 %{python3_sitelib}/rust2rpm/
 
 %changelog
+* Sat Sep 07 2019 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 10-6
+- Depend on setuptools in runtime
+
 * Mon Aug 19 2019 Miro Hrončok <mhroncok@redhat.com> - 10-5
 - Rebuilt for Python 3.8