Replace non-standard Python plat env marker (#11035)

Fixes #11034.

(cherry picked from commit 78d0a24f98e3a7f3ea76acf5e47ace848adc2e2b)

Change-Id: I43e5229612e6a881e547db08780f3223dfe1c5c3

diff --git a/pyproject.toml b/pyproject.toml
index 3cdf49301f79b6b6b3e3678d34fbd0cabdec3afd..780c9bf689a6b844c8ac8165555ef0f8972c568b 100644 (file)
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
     build-backend = "setuptools.build_meta"
     requires = [
         "setuptools>=47",
-        "cython>=0.29.24; python_implementation == 'CPython'", # Skip cython when using pypy
+        "cython>=0.29.24; platform_python_implementation == 'CPython'", # Skip cython when using pypy
     ]
 
 [tool.black]