diff --git a/README.md b/README.md
index e2dd853..40b0778 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,12 @@ The action is extracting all the Pull Requests that are declared in
 the description of the Pull Request with `Depends-On: <PR url>`
 syntax.
 
+If you need to specify a subdir for a particular PR, use the following syntax:
+
+```txt
+Depends-On: <PR url>?subdir=<subdir path>
+```
+
 It then injects the needed changes in the code to use the other Pull Requests.
 
 ### Go lang
diff --git a/python.py b/python.py
index 42151d7..483814b 100644
--- a/python.py
+++ b/python.py
@@ -8,6 +8,7 @@
 def lookup_name(fname):
     "Lookup the name of a module"
     if os.path.exists(fname):
+        print(f"Looking up name in {fname}", file=sys.stderr)
         with open(fname, "r", encoding="UTF-8") as in_stream:
             for line in in_stream.readlines():
                 match = re.match(r"^\s*name\s*=\s*['\"](.*?)['\"]\s*,", line)
@@ -48,6 +49,10 @@ def process_python_requirements(main_dir, dirs, container_mode):
                     if container_mode:
                         # doc at https://pip.pypa.io/en/stable/cli/pip_install/#git
                         pkg = f"{mod} @ git+{module_dirs[mod]['fork_url']}@{module_dirs[mod]['branch']}"
+                        if "subdir" in module_dirs[mod]:
+                            pkg += (
+                                f"#egg=subdir&subdirectory={module_dirs[mod]['subdir']}"
+                            )
                         print(
                             f"Replacing {mod} in requirements.txt with {pkg}",
                             file=sys.stderr,
@@ -86,7 +91,13 @@ def process_python_pyproject(main_dir, dirs, container_mode):
                     mod = match.group(1)
                     if container_mode:
                         # doc at https://python-poetry.org/docs/dependency-specification/#git-dependencies
-                        pkg = f"{mod} = {{ git = \"{module_dirs[mod]['fork_url']}\", branch = \"{module_dirs[mod]['branch']}\" }}"
+                        pkg = f"{mod} = {{ git = \"{module_dirs[mod]['fork_url']}\", branch = \"{module_dirs[mod]['branch']}\""
+                        if "subdir" in module_dirs[mod]:
+                            pkg += (
+                                f", subdirectory = \"{module_dirs[mod]['subdir']}\" }}"
+                            )
+                        else:
+                            pkg += " }"
                         print(
                             f"Replacing {mod} in pyproject.toml with {pkg}",
                             file=sys.stderr,
diff --git a/stage1.py b/stage1.py
index 9838585..426d355 100755
--- a/stage1.py
+++ b/stage1.py
@@ -147,7 +147,7 @@ def main(check_mode):
 
     nb_unmerged_pr = 0
     for depends_on_url in depends_on:
-        merged = extract_depends_on(depends_on_url, check_mode)
+        merged = extract_depends_on(depends_on_url.strip(), check_mode)
         if not merged:
             nb_unmerged_pr += 1