Use ninja<1.11 as the constraint.

Author: oscarbenjamin

.github/workflows/buildwheel.yml

@@ -156,7 +156,7 @@ jobs:
       # We don't need to specify ninja as a requirement in pyproject.toml
       # because without --no-build-isolation meson-python handles it
       # automatically in get_requirements_for_build_wheel().
-      - run: 'pip install cython==3.0 meson-python==0.13 ninja==1.10'
+      - run: 'pip install cython==3.0 meson-python==0.13 ninja<1.11'
       - run: pip install --no-build-isolation .
       - run: python -m flint.test --verbose
 

pyproject.toml

@@ -1,8 +1,3 @@
-[build-system]
-# Minimum build requirements tested in CI need to be kept in sync with this.
-requires = ["meson-python>=0.13", "cython>=3.0"]
-build-backend = "mesonpy"
-
 [project]
 name = "python-flint"
 description = "Bindings for FLINT and Arb"
@@ -20,6 +15,11 @@ classifiers = [
 file = "README.md"
 content-type = "text/markdown"
 
+[build-system]
+# Minimum build requirements tested in CI need to be kept in sync with this.
+requires = ["meson-python>=0.13", "cython>=3.0"]
+build-backend = "mesonpy"
+
 [tool.spin]
 package = "flint"