diff --git a/tools/toolchains/__init__.py b/tools/toolchains/__init__.py
index 845312b8df..2236c20737 100644
--- a/tools/toolchains/__init__.py
+++ b/tools/toolchains/__init__.py
@@ -341,7 +341,7 @@ class mbedToolchain:
 
         return False
 
-    def scan_resources(self, path):
+    def scan_resources(self, path, exclude_paths=None):
         labels = self.get_labels()
         resources = Resources(path)
         self.has_config = False
@@ -359,12 +359,23 @@ class mbedToolchain:
         for root, dirs, files in walk(path):
             # Remove ignored directories
             for d in copy(dirs):
+                dir_path = join(root, d)
+                
                 if d == '.hg':
-                    dir_path = join(root, d)
                     resources.repo_dirs.append(dir_path)
                     resources.repo_files.extend(self.scan_repository(dir_path))
+                
+                should_exclude_path = False
+                
+                if exclude_paths:
+                    for exclude_path in exclude_paths:
+                        rel_path = relpath(dir_path, exclude_path)
+                        if not (rel_path.startswith('..')):
+                            should_exclude_path = True
+                            break
 
-                if ((d.startswith('.') or d in self.legacy_ignore_dirs) or
+                if ((should_exclude_path) or
+                    (d.startswith('.') or d in self.legacy_ignore_dirs) or
                     (d.startswith('TARGET_') and d[7:] not in labels['TARGET']) or
                     (d.startswith('TOOLCHAIN_') and d[10:] not in labels['TOOLCHAIN']) or
                     (d == 'TESTS')):