diff --git a/dev-python/theano/theano-1.0.5.ebuild b/dev-python/theano/theano-1.0.5-r1.ebuild
similarity index 83%
rename from dev-python/theano/theano-1.0.5.ebuild
rename to dev-python/theano/theano-1.0.5-r1.ebuild
index bf10d34c41e12..aa340176494e1 100644
--- a/dev-python/theano/theano-1.0.5.ebuild
+++ b/dev-python/theano/theano-1.0.5-r1.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -42,6 +42,12 @@ python_test() {
 	nosetests --verbosity=3 -e test_format_flake8 || die
 }
 
+# https://dev.gentoo.org/~mgorny/python-guide/concept.html#packaging-pkgutil-style-namespaces-in-gentoo
+python_install() {
+	rm "${BUILD_DIR}"/lib/bin/__init__.py || die
+	distutils-r1_python_install
+}
+
 pkg_postinst() {
 	optfeature "Make picture of Theano computation graph" dev-python/pydot-ng
 	optfeature "Required for GPU/CPU code generation" dev-python/pygpu