--- contrib/python/matplotlib/py3/matplotlib/__init__.py	(index)
+++ contrib/python/matplotlib/py3/matplotlib/__init__.py	(working tree)
@@ -529,1 +529,1 @@ def _get_data_path():
-    return str(Path(__file__).with_name("mpl-data"))
+    return _get_internal_mpl_data()
@@ -530,4 +530,18 @@ def get_cachedir():
 
 
+def _get_internal_mpl_data():
+    import tempfile
+    import __res
+
+    tmp_dir = tempfile.mkdtemp(prefix='mpl-temp', dir=tempfile.gettempdir())
+    for key, rel_path in __res.iter_keys(b"resfs/file/contrib/python/matplotlib/py3/matplotlib/mpl-data/"):
+        filename = f"{tmp_dir}/{str(rel_path, 'ascii')}"
+        os.makedirs(os.path.dirname(filename), exist_ok=True)
+        with open(filename, 'wb') as f:
+            f.write(__res.find(key))
+
+    return tmp_dir
+
+
 def matplotlib_fname():
     """
--- contrib/python/matplotlib/py3/matplotlib/backends/backend_nbagg.py	(index)
+++ contrib/python/matplotlib/py3/matplotlib/backends/backend_nbagg.py	(working tree)
@@ -111,9 +111,9 @@ class FigureManagerNbAgg(FigureManagerWebAgg):
         else:
             output = stream
         super().get_javascript(stream=output)
-        output.write((pathlib.Path(__file__).parent
-                      / "web_backend/js/nbagg_mpl.js")
-                     .read_text(encoding="utf-8"))
+        import pkgutil
+        data = pkgutil.get_data(__package__, "web_backend/js/nbagg_mpl.js").decode("utf-8")
+        output.write(data)
         if stream is None:
             return output.getvalue()
 
--- contrib/python/matplotlib/py3/matplotlib/backends/backend_webagg_core.py	(index)
+++ contrib/python/matplotlib/py3/matplotlib/backends/backend_webagg_core.py	(working tree)
@@ -505,8 +505,9 @@ class FigureManagerWebAgg(backend_bases.FigureManagerBase):
         else:
             output = stream
 
-        output.write((Path(__file__).parent / "web_backend/js/mpl.js")
-                     .read_text(encoding="utf-8"))
+        import pkgutil
+        data = pkgutil.get_data(__package__, "web_backend/js/mpl.js").decode("utf-8")
+        output.write(data)
 
         toolitems = []
         for name, tooltip, image, method in cls.ToolbarCls.toolitems: