fixup ci

Author: jhamman

changes/3452.feature.rst

@@ -3,4 +3,4 @@ Add optional uvloop support for improved async performance.
 When uvloop is available, Zarr will automatically use it as the event loop implementation
 for better I/O performance. This can be controlled via the ``async.use_uvloop`` configuration
 setting or the ``ZARR_ASYNC__USE_UVLOOP`` environment variable. uvloop can be installed
-with ``pip install 'zarr[uvloop]'``.
+with ``pip install 'zarr[optional]'`` (Unix/Linux/macOS only).

docs/user-guide/performance.rst

@@ -289,12 +289,17 @@ Installation
 
 To enable uvloop support, install it as an optional dependency::
 
-   pip install 'zarr[uvloop]'
+   pip install 'zarr[optional]'
 
-Or install uvloop directly::
+Or install uvloop directly (Unix/Linux/macOS only)::
 
    pip install uvloop
 
+.. note::
+   uvloop is automatically included in the ``optional`` dependency group, but only
+   installed on supported platforms (Unix/Linux/macOS). On Windows, the installation
+   will succeed but uvloop will be skipped.
+
 Configuration
 ~~~~~~~~~~~~~
 

pyproject.toml

@@ -91,7 +91,11 @@ remote_tests = [
     "moto[s3,server]",
     "requests",
 ]
-optional = ["rich", "universal-pathlib", "uvloop"]
+optional = [
+    "rich",
+    "universal-pathlib",
+    "uvloop; sys_platform != 'win32'"
+]
 docs = [
     # Doc building
     'sphinx==8.1.3',
@@ -229,7 +233,7 @@ dependencies = [
     'typing_extensions==4.9.*',
     'donfig==0.8.*',
     'obstore==0.5.*',
-    'uvloop==0.20.0',
+    'uvloop==0.20.0; sys_platform != "win32"',
     # test deps
     'zarr[test]',
     'zarr[remote_tests]',