diff --git a/dev-python/oslo-serialization/oslo-serialization-2.20.2.ebuild b/dev-python/oslo-serialization/oslo-serialization-2.20.2-r1.ebuild
similarity index 96%
rename from dev-python/oslo-serialization/oslo-serialization-2.20.2.ebuild
rename to dev-python/oslo-serialization/oslo-serialization-2.20.2-r1.ebuild
index affdc3d0103e1..cb966ec5d7f4e 100644
--- a/dev-python/oslo-serialization/oslo-serialization-2.20.2.ebuild
+++ b/dev-python/oslo-serialization/oslo-serialization-2.20.2-r1.ebuild
@@ -48,6 +48,8 @@ RDEPEND="
 "
 
 python_prepare_all() {
+	# allow useage of renamed msgpack
+	sed -i '/^msgpack/d' requirements.txt || die
 	use doc && esetup.py build_sphinx
 	distutils-r1_python_prepare_all
 }
diff --git a/dev-python/oslo-serialization/oslo-serialization-2.24.0.ebuild b/dev-python/oslo-serialization/oslo-serialization-2.24.0-r1.ebuild
similarity index 96%
rename from dev-python/oslo-serialization/oslo-serialization-2.24.0.ebuild
rename to dev-python/oslo-serialization/oslo-serialization-2.24.0-r1.ebuild
index ef5eba506886f..adad76ab9afe4 100644
--- a/dev-python/oslo-serialization/oslo-serialization-2.24.0.ebuild
+++ b/dev-python/oslo-serialization/oslo-serialization-2.24.0-r1.ebuild
@@ -46,6 +46,8 @@ RDEPEND="
 "
 
 python_prepare_all() {
+	# allow useage of renamed msgpack
+	sed -i '/^msgpack/d' requirements.txt || die
 	use doc && esetup.py build_sphinx
 	distutils-r1_python_prepare_all
 }