diff -up rpmlint-2.0.0/rpmlint/pkg.py.672 rpmlint-2.0.0/rpmlint/pkg.py
--- rpmlint-2.0.0/rpmlint/pkg.py.672	2021-07-01 12:07:42.406914041 -0400
+++ rpmlint-2.0.0/rpmlint/pkg.py	2021-07-01 12:08:31.965200930 -0400
@@ -480,8 +480,10 @@ class Pkg(AbstractPkg):
     def _extract(self, dirname, verbose):
         if not Path(dirname).is_dir():
             print_warning('Unable to access dir %s' % dirname)
+        elif dirname == '/':
+            # it is an InstalledPkg
+            pass
         else:
-            dirname = dirname if dirname != '/' else None
             self.__tmpdir = tempfile.TemporaryDirectory(
                 prefix='rpmlint.%s.' % Path(self.filename).name, dir=dirname
             )
diff -up rpmlint-2.0.0/test/test_lint.py.672 rpmlint-2.0.0/test/test_lint.py
--- rpmlint-2.0.0/test/test_lint.py.672	2021-07-01 12:08:44.717274750 -0400
+++ rpmlint-2.0.0/test/test_lint.py	2021-07-01 12:09:40.593598217 -0400
@@ -391,3 +391,17 @@ def test_run_rpmlintrc_single_file(capsy
     out, err = capsys.readouterr()
     assert not err
     assert 'rpmlintrc:' in out
+
+
+
+def test_installed_package(capsys):
+    additional_options = {
+        'installed': ['bzip2'],
+        'permissive': True
+    }
+    options = {**options_preset, **additional_options}
+    linter = Lint(options)
+    retcode = linter.run()
+    out, err = capsys.readouterr()
+    assert '1 packages and 0 specfiles checked' in out
+    assert retcode == 0