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-rw-r--r--pym/portage/dbapi/bintree.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/pym/portage/dbapi/bintree.py b/pym/portage/dbapi/bintree.py
index ce162fccb..4420b728b 100644
--- a/pym/portage/dbapi/bintree.py
+++ b/pym/portage/dbapi/bintree.py
@@ -1046,7 +1046,7 @@ class binarytree(object):
return False
def _eval_use_flags(self, cpv, metadata):
- use = metadata["USE"].split()
+ use = frozenset(metadata["USE"].split())
raw_use = use
iuse = set(f.lstrip("-+") for f in metadata["IUSE"].split())
use = [f for f in use if f in iuse]