diff --git a/src/serena/util/file_system.py b/src/serena/util/file_system.py
index 26a59438..e4195aec 100644
--- a/src/serena/util/file_system.py
+++ b/src/serena/util/file_system.py
@@ -1,4 +1,5 @@
 import glob
+import logging
 import os
 from collections.abc import Callable
 from dataclasses import dataclass, field
@@ -7,6 +8,8 @@ from typing import NamedTuple
 import pathspec
 from pathspec import PathSpec
 
+log = logging.getLogger(__name__)
+
 
 class ScanResult(NamedTuple):
     """Result of scanning a directory."""
@@ -243,7 +246,13 @@ class GitignoreParser:
         """
         # Convert to relative path from repo root
         if os.path.isabs(path):
-            rel_path = os.path.relpath(path, self.repo_root)
+            try:
+                rel_path = os.path.relpath(path, self.repo_root)
+            except Exception as e:
+                # If the path could not be converted to a relative path,
+                # it is outside the repository root, so we ignore it
+                log.info("Ignoring path '%s' which is outside of the repository root (%s)", path, e)
+                return True
         else:
             rel_path = path