From c0ab02bbf9cd6b607f4866e514bf79a3d143d020 Mon Sep 17 00:00:00 2001
From: Mathieu Scheltienne <mathieu.scheltienne@gmail.com>
Date: Mon, 26 Jan 2026 11:42:08 +0100
Subject: [PATCH 1/2] Support namespace package in sys_info

---
 src/template/utils/config.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/template/utils/config.py b/src/template/utils/config.py
index a4ea5cc..cd6985f 100644
--- a/src/template/utils/config.py
+++ b/src/template/utils/config.py
@@ -47,7 +47,8 @@ def sys_info(
 
     ljust = 26
     out = partial(print, end="", file=fid)
-    package = __package__.split(".")[0] if package is None else package
+    package = __package__ if package is None else package
+    package = package.replace("-", "_") if "-" in package else package
 
     # OS information - requires python 3.8 or above
     out("Platform:".ljust(ljust) + platform.platform() + "\n")

From 45cc197e42e723ddba6d19acd5063a2913e84bab Mon Sep 17 00:00:00 2001
From: Mathieu Scheltienne <mathieu.scheltienne@dandelion.science>
Date: Mon, 26 Jan 2026 11:57:12 +0100
Subject: [PATCH 2/2] fix

---
 src/template/utils/config.py | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/src/template/utils/config.py b/src/template/utils/config.py
index cd6985f..e38ca33 100644
--- a/src/template/utils/config.py
+++ b/src/template/utils/config.py
@@ -4,7 +4,7 @@
 import sys
 import tomllib
 from functools import lru_cache, partial
-from importlib.metadata import metadata, requires, version
+from importlib.metadata import PackageNotFoundError, metadata, requires, version
 from importlib.util import find_spec
 from pathlib import Path
 from typing import TYPE_CHECKING
@@ -47,8 +47,10 @@ def sys_info(
 
     ljust = 26
     out = partial(print, end="", file=fid)
-    package = __package__ if package is None else package
-    package = package.replace("-", "_") if "-" in package else package
+    if package is None:
+        package = _find_distribution_name(__package__)
+    if "-" in package:
+        package = package.replace("-", "_")
 
     # OS information - requires python 3.8 or above
     out("Platform:".ljust(ljust) + platform.platform() + "\n")
@@ -180,6 +182,25 @@ def _list_dependencies_info(
             out(f"Not installed: {', '.join(not_found)}\n")
 
 
+def _find_distribution_name(module_package: str) -> str:
+    """Find the distribution name from a module's ``__package__``.
+
+    Tries progressively shorter prefixes until finding one with valid metadata.
+    Handles both regular packages (e.g., ``template.utils`` -> ``template``) and
+    namespace packages (e.g., ``sphinxcontrib.pydantic.utils`` ->
+    ``sphinxcontrib.pydantic``).
+    """
+    parts = module_package.split(".")
+    for i in range(len(parts), 0, -1):
+        candidate = ".".join(parts[:i])
+        try:
+            version(candidate)
+            return candidate
+        except PackageNotFoundError:
+            continue
+    return module_package
+
+
 @lru_cache(maxsize=1)
 def _get_gpu_info() -> tuple[str | None, str | None]:
     """Get the GPU information."""