Fix devdeps

pyproject.toml

@@ -53,7 +53,7 @@ requires = [
     'setuptools>=61.2',
     'setuptools_scm>=6.2',
     'cython>=3.0.0,<3.1.0',
-    'numpy',
+    'numpy>=1.25',
     'extension-helpers==1.*',
 ]
 build-backend = 'setuptools.build_meta'

tox.ini

@@ -7,9 +7,6 @@ envlist =
     codestyle
     pep517
     bandit
-requires =
-    setuptools >= 61.2
-    pip >= 19.3.1
 isolated_build = true
 indexserver =
     NRAO = https://casa-pip.nrao.edu/repository/pypi-group/simple
@@ -18,7 +15,7 @@ indexserver =
 # Suppress display of matplotlib plots generated during docs build
 setenv =
     MPLBACKEND=agg
-    devdeps: PIP_EXTRA_INDEX_URL = https://pypi.anaconda.org/scientific-python-nightly-wheels/simple https://pypi.anaconda.org/astropy/simple
+    devdeps: PIP_EXTRA_INDEX_URL = https://pypi.anaconda.org/scientific-python-nightly-wheels/simple https://pypi.anaconda.org/liberfa/simple https://pypi.anaconda.org/astropy/simple
 
 # Pass through the following environment variables which may be needed
 # for the CI
@@ -70,6 +67,7 @@ deps =
 
     devdeps: numpy>=0.0.dev0
     devdeps: matplotlib>=0.0.dev0
+    devdeps: pyerfa>=0.0.dev0
     devdeps: astropy>=0.0.dev0
 
     # Latest developer version of infrastructure packages.
@@ -89,6 +87,10 @@ extras =
     alldeps: all
     build_docs: docs
 
+install_command =
+    !devdeps: python -I -m pip install
+    devdeps: python -I -m pip install -v --pre
+
 commands =
     # Force numpy-dev after matplotlib downgrades it
     # (https://github.com/matplotlib/matplotlib/issues/26847)