Pin Poetry version <2

CONTRIBUTING.rst

@@ -87,6 +87,15 @@ Install `poetry`_ and `poethepoet`_ using `pipx`_::
 
     $ pipx install poetry poethepoet
 
+.. admonition:: Check ``tool.pipx-install`` section in ``pyproject.toml`` to
+   see supported versions
+
+  ::
+
+      [tool.pipx-install]
+      poethepoet = ">=0.26"
+      poetry = "<2"
+
 .. _pipx: https://pipx.pypa.io/stable
 .. _pipx-installation-instructions: https://pipx.pypa.io/stable/installation/
 

docs/changelog.rst

@@ -6,18 +6,16 @@ Changelog goes here! Please add your entry to the bottom of one of the lists bel
 Unreleased
 ----------
 
-New features:
-
 Bug fixes:
-
 * :doc:`/reference/pathformat`: Fixed a regression where path legalization
   incorrectly removed parts of user-configured path formats that followed a dot
   (**.**).
   :bug:`5771`
 
 For packagers:
-
+* Force ``poetry`` version below 2 to avoid it mangling file modification times
-Other changes:
+  in ``sdist`` package.
+  :bug:`5770`
 
 2.3.0 (May 07, 2025)
 --------------------
@@ -115,8 +113,8 @@ Other changes:
   :bug:`5539`
 * :doc:`/plugins/smartplaylist`: URL-encode additional item `fields` within generated
   EXTM3U playlists instead of JSON-encoding them.
-* typehints: `./beets/importer.py` file now has improved typehints. 
+* typehints: `./beets/importer.py` file now has improved typehints.
-* typehints: `./beets/plugins.py` file now includes typehints. 
+* typehints: `./beets/plugins.py` file now includes typehints.
 * :doc:`plugins/ftintitle`: Optimize the plugin by avoiding unnecessary writes
   to the database.
 * Database models are now serializable with pickle.

pyproject.toml

@@ -159,7 +159,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.pipx-install]
 poethepoet = ">=0.26"
-poetry = ">=1.8"
+poetry = ">=1.8,<2"
 
 [tool.poe.tasks.build]
 help = "Build the package"