Use oldest-supported-numpy for build

.github/workflows/build-wheels.yml

@@ -40,12 +40,12 @@ jobs:
         env:
           CIBW_ARCHS_LINUX: x86_64 aarch64
           CIBW_ARCHS_MACOS: x86_64 arm64
-          CIBW_ARCHS_WINDOWS: AMD64 x86 ARM64
-          CIBW_BEFORE_BUILD: pip install numpy scipy
+          CIBW_ARCHS_WINDOWS: AMD64 x86
           CIBW_SKIP: pp* cp36-* cp37-* *-win32 *_i686 *-musllinux_*
           CIBW_TEST_COMMAND: pytest -rfxEXs --durations=20 --disable-warnings --showlocals --pyargs gensim
           CIBW_TEST_REQUIRES: pytest testfixtures mock
           CIBW_TEST_SKIP: cp38* cp39* cp310* *_aarch64 *_arm64 *_universal2
+          CIBW_BUILD_VERBOSITY: 3
 
       - name: Upload wheels as artifacts
         if: always()

pyproject.toml

@@ -0,0 +1,10 @@
+[build-system]
+requires = [
+	# oldest supported Numpy for this platform is 1.17 but the oldest supported by Gensim
+	# is 1.18.5, remove the line when they increase oldest supported Numpy for this platform
+	"numpy==1.18.5; python_version=='3.8' and platform_machine not in 'arm64|aarch64'",
+	"oldest-supported-numpy; python_version>'3.8' or platform_machine in 'arm64|aarch64'", 
+	"scipy",
+	"setuptools", 
+	"wheel", 
+]

setup.py

@@ -346,11 +346,8 @@ def run(self):
     'smart_open >= 1.8.1',
 ]
 
-setup_requires = [NUMPY_STR]
-
 if need_cython():
     install_requires.append(CYTHON_STR)
-    setup_requires.append(CYTHON_STR)
 
 setup(
     name='gensim',
@@ -399,7 +396,6 @@ def run(self):
 
     test_suite="gensim.test",
     python_requires='>=3.8',
-    setup_requires=setup_requires,
     install_requires=install_requires,
     tests_require=linux_testenv,
     extras_require={