diff --git a/sau/gentoo.py b/sau/gentoo.py
index f1b5d8a..4e3e27c 100644
--- a/sau/gentoo.py
+++ b/sau/gentoo.py
@@ -119,6 +119,9 @@ def is_system_package(atom, eclasses):
         log.debug(f"{name} is a sys-boot package")
         return True
 
+    if eclasses is True:
+        return True
+
     # libc-packages should be considered system-packages as they generally
     # requires the system to be restarted. Not sure if there is a better way
     # then just checking for specific packages here, but as far as I know there
@@ -140,7 +143,7 @@ def is_system_package(atom, eclasses):
 def get_eclasses(atom):
     log = logging.getLogger(sau.LOGNAME)
     eclasses = []
-    name=re.sub(r'^[<=>]*(.*?)(?:-\d)?(?:::\w+)?$', r'\1', atom)
+    name=re.sub(r'^[<=>]*(.*?)(?:-\d+)?(?:::\w+)?$', r'\1', atom)
     test_re = re.compile(r'^\s*inherit\s+')
     cmd=[ EQUERY_PATH, 'w', name ]
     ret, out, err = sau.helpers.exec_cmd(cmd)