Adjusting Cython versions.

.github/workflows/tests.yml

@@ -115,7 +115,7 @@ jobs:
         run: |
           pip install -U pip
           pip install -U -q setuptools wheel twine
-          pip install -q -U 'cython>=3.0b3'
+          pip install -q -U 'cython>=3.0b3; python_version < "3.12"' "Cython @ https://github.com/cython/cython/archive/37f4dcdc04547875e2836fda076f5707ec50e579.zip; python_version >= '3.12'"
           pip install -U coverage
           pip install -U cffi
       - name: Build mysqlclient

pyproject.toml

@@ -15,8 +15,11 @@ requires = [
      # 3.0 in general has improved language support.
      # Python 3.12 requires a snapshot at this writing (2023-06-29). This is just before
      # 3.0rc1
-     "Cython >= 3.0b3; python_version < '3.12'",
+     # Unfortunately, markers like python_version do not work for remote installs,
+     # so we may always get that one?
+     # Remember to change this in tests.yml as well
      "Cython @ https://github.com/cython/cython/archive/37f4dcdc04547875e2836fda076f5707ec50e579.zip",
+     "Cython >= 3.0b3; python_version < '3.12'",
      # cffi on py3.12 macOS at least fails to install from its wheel if we let it get installed
      # as part of persistent:
      # OSError: [Errno 66] Directory not empty: '///persistent.../.eggs/cffi-1.15.1-py3.12-macosx-10.9-universal2.egg/cffi-1.15.1.dist-info' -> '//persistent_/.eggs/cffi-1.15.1-py3.12-macosx-10.9-universal2.egg/EGG-INFO'

scripts/releases/make-manylinux

@@ -105,7 +105,8 @@ if [ -d /RelStorage -a -d /opt/python ]; then
         git clone /RelStorage RelStorage
         cd RelStorage
         $variant/bin/pip install -U pip
-        #$variant/bin/pip install -U 'cython>=3.0b3' setuptools
+        $variant/bin/pip install -U setuptools
+        $variant/bin/pip install -U 'cython>=3.0b3; python_version < "3.12"' "Cython @ https://github.com/cython/cython/archive/37f4dcdc04547875e2836fda076f5707ec50e579.zip; python_version >= '3.12'"
         PATH=$variant/bin:$PATH $variant/bin/python setup.py bdist_wheel
         auditwheel show dist/RelStorage*.whl
         auditwheel repair dist/RelStorage*.whl