Not ready for python2 due to dependencies

appveyor.yml

@@ -20,7 +20,7 @@ install:
   - "set TMPDIR=C:\\tmp"
   - python -c "import sys; print(sys.executable, sys.version)"
   - python -m pip install --upgrade pip setuptools
-  - python -m pip install pytest numpy
+  - python -m pip install pytest 'numpy<2'
   - python -m pip install --ignore-installed certifi --upgrade-strategy only-if-needed --only-binary=h5py --only-binary=scipy --only-binary=hdf5plugin .
 
 

pyproject.toml

@@ -7,8 +7,12 @@ requires = ["setuptools",
 # See https://numpy.org/doc/2.0/dev/depending_on_numpy.html
 #
 # This gives you all versions < 2.0
-#            "oldest-supported-numpy; python_version>='3.0'" ]
+            "oldest-supported-numpy; python_version>='3.0'" ]
 #
 # This gives all versions > 1.25
-            "numpy>=2.0.0rc1; python_version>='3.0'" ]
+#            "numpy>=2.0.0rc1; python_version>='3.0'" ]
+#
+# As usual, the dependencies are not ready.
+# pin numpy < 2 for now.
+#
 build-backend = "setuptools.build_meta"

setup.py

@@ -143,7 +143,8 @@ def build_extension(self, ext):
 minimal = [  # can't compile without this
     "six",
     'numpy ; python_version < "3"',
-    'numpy>=1.23.5 ; python_version >= "3"',
+    # Until the dependencies are ready
+    'numpy<2 ; python_version >= "3"',
     "setuptools",
     ]