diff --git a/python-IMAPClient.spec b/python-IMAPClient.spec
index 049318b..a337774 100644
--- a/python-IMAPClient.spec
+++ b/python-IMAPClient.spec
@@ -59,7 +59,7 @@ functional tests that can be run against a live IMAP server.
 
 %install
 %python_install
-%fdupes %{buildroot}%{_prefix}
+%python_expand %fdupes %{buildroot}%{$python_sitelib}
 
 %check
 # test_redacted_password fails on openSUSE 15.x only