fix: address linting errors

Author: mldangelo

src/promptfoo/cli.py

@@ -108,12 +108,14 @@ def _find_external_promptfoo() -> Optional[str]:
 
     if argv0_path and promptfoo_path_norm == argv0_path:
         is_self = True
-    elif sys.prefix != sys.base_prefix:
+    elif (
+        sys.prefix != sys.base_prefix
+        and os.path.dirname(promptfoo_path_norm) == os.path.dirname(_normalize_path(sys.executable))
+    ):
         # Running in a virtual environment. Check if the found executable is in the same
         # directory as the Python interpreter. This detects shims (e.g. Windows .exe, uv)
         # where argv0 points to the script but shutil.which finds the shim.
-        if os.path.dirname(promptfoo_path_norm) == os.path.dirname(_normalize_path(sys.executable)):
-            is_self = True
+        is_self = True
 
     if is_self:
         wrapper_dir = _normalize_path(os.path.dirname(promptfoo_path))