diff --git a/sci-chemistry/openbabel-python/openbabel-python-2.4.1.ebuild b/sci-chemistry/openbabel-python/openbabel-python-2.4.1-r1.ebuild
similarity index 98%
rename from sci-chemistry/openbabel-python/openbabel-python-2.4.1.ebuild
rename to sci-chemistry/openbabel-python/openbabel-python-2.4.1-r1.ebuild
index d7a9eb9e2cb65..84f9aa89e74b3 100644
--- a/sci-chemistry/openbabel-python/openbabel-python-2.4.1.ebuild
+++ b/sci-chemistry/openbabel-python/openbabel-python-2.4.1-r1.ebuild
@@ -61,7 +61,7 @@ src_configure() {
 			-DPYTHON_INCLUDE_PATH="$(python_get_includedir)"
 			-DPYTHON_LIBRARY="$(python_get_library_path)"
 			-DENABLE_TESTS=ON
-			-DCMAKE_INSTALL_PREFIX="${ED}"
+			-DCMAKE_INSTALL_PREFIX="${ED%/}/usr"
 		)
 
 		cmake-utils_src_configure