diff --git a/README.md b/README.md
index c593377..1fc3d7d 100644
--- a/README.md
+++ b/README.md
@@ -26,38 +26,47 @@ not fully ported grouped by Pull Request and propose to port them.
 
 Syntax:
 
-    $ oca-port <source> <target> <module> [options]
+    $ oca-port <source> <target> <module_path> [options]
     $ oca-port --help
 
 To check if an addon could be migrated or to get eligible commits to port:
 
     $ export GITHUB_TOKEN=<token>
     $ cd <path/to/OCA/cloned_repository>
-    $ oca-port origin/14.0 origin/16.0 <module> --verbose --dry-run
+    $ oca-port origin/16.0 origin/18.0 <module_path> --verbose --dry-run
 
 To effectively migrate the addon or port its commits, remove the `--dry-run` option
 so the tool will create a working local branch automatically (called destination)
 from the `<target>` branch:
 
-    $ oca-port origin/14.0 origin/16.0 <module>
+    $ oca-port origin/16.0 origin/18.0 <module_path>
 
 You can control the destination with the `--destination` option:
 
-    $ oca-port origin/14.0 origin/16.0 <module> --destination camptocamp/16.0-port-things
+    $ oca-port origin/16.0 origin/18.0 <module_path> --destination camptocamp/18.0-port-things
+
+The module can be located in a subfolder, and the tool can be used in any kind of repository, e.g:
+
+    $ oca-port origin/main origin/18.0-mig --source-version=16.0 --target-version=18.0 --upstream-org=camptocamp ./odoo/local-src/MY_MODULE --verbose --destination sebalix/18.0-mig-MY_MODULE
+
+- parameters `--source-version` and `--target-version` are mandatory as soon as
+  the `source`/`target` parameters cannot be recognized as Odoo versions (here
+  `origin/main` is hosting a `16.0` version)
+- `--upstream-org` defaults to `OCA`, here we set it to `camptocamp` for GitHub API requests
 
 You can also directly blacklist a bunch of PRs on a given branch thanks to the
 `oca-port-pr` tool:
 
-    $ oca-port-pr blacklist OCA/wms#250,OCA/wms#251 15.0 shopfloor
+    $ oca-port-pr blacklist OCA/wms#250,OCA/wms#251 16.0 shopfloor
 
 You could give a more detailed reason of this blacklist with `--reason` parameter:
 
-    $ oca-port-pr blacklist OCA/wms#250,OCA/wms#251 15.0 shopfloor --reason "Refactored in 15.0, not needed anymore"
+    $ oca-port-pr blacklist OCA/wms#250,OCA/wms#251 16.0 shopfloor --reason "Refactored in 16.0, not needed anymore"
 
 And if the module has been moved to another repository, you can specify its remote as well:
 
     $ git remote add new_repo git@github.com:OCA/new-repo.git
-    $ oca-port-pr blacklist OCA/wms#250,OCA/wms#251 15.0 shopfloor --remote new_repo
+    $ oca-port-pr blacklist OCA/wms#250,OCA/wms#251 16.0 shopfloor --remote new_repo
 
 Migration of addon
 ------------------
@@ -101,7 +110,7 @@ You can also use `oca-port` as a Python package:
 >>> app = oca_port.App(
 ...     source="origin/14.0",
 ...     target="origin/16.0",
-...     addon="stock_move_auto_assign",
+...     addon_path="stock_move_auto_assign",
 ...     upstream_org": "OCA",
 ...     repo_path": "/home/odoo/OCA/stock-logistics-warehouse",
 ...     output": "json",
diff --git a/oca_port/utils/git.py b/oca_port/utils/git.py
index d054c3b..9611bc5 100644
--- a/oca_port/utils/git.py
+++ b/oca_port/utils/git.py
@@ -99,7 +99,15 @@ def paths(self):
         """
         if self._paths:
             return self._paths
-        self._paths = {CommitPath(self.addons_path, f) for f in self.files}
+        self._paths = set()
+        for f in self.files:
+            # Could raise "ValueError: 'f' is not in the subpath of 'addons_path'"
+            # in such case we ignore these files, and keep ones in 'addons_path'
+            try:
+                commit_path = CommitPath(self.addons_path, f)
+            except ValueError:
+                continue
+            self._paths.add(commit_path)
         return self._paths
 
     def _get_files(self):