fix: require dev NumPy

.github/workflows/tests.yml

@@ -86,7 +86,7 @@ jobs:
           create-symlink: true
 
       - name: Install python tools
-        run: uv pip install --system -r dev-requirements.txt pytest-github-actions-annotate-failures
+        run: uv pip install --system -r dev-requirements.txt pytest-github-actions-annotate-failures --extra-index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
 
       - name: Configure
         run: cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Debug -DBOOST_HISTOGRAM_ERRORS=ON ${{ matrix.cmake-extras }}
@@ -128,6 +128,7 @@ jobs:
         env:
           CIBW_BUILD: "${{ matrix.build }}"
           CIBW_BUILD_VERBOSITY: 1
+          PIP_EXTRA_INDEX_URL: https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
 
       - uses: actions/upload-artifact@v4
         with:

.github/workflows/wheels.yml

@@ -61,6 +61,7 @@ jobs:
         env:
           CIBW_BUILD: cp${{ matrix.python }}-manylinux_*
           CIBW_ARCHS: ${{ matrix.arch }}
+          PIP_EXTRA_INDEX_URL: https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
 
       - name: Verify clean directory
         run: git diff --exit-code
@@ -119,6 +120,7 @@ jobs:
         env:
           CIBW_BUILD: ${{ matrix.build }}
           CIBW_ARCHS: ${{ matrix.arch }}
+          PIP_EXTRA_INDEX_URL: https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
 
       - name: Verify clean directory
         run: git diff --exit-code

dev-requirements.txt

@@ -1,6 +1,7 @@
 cloudpickle
 hypothesis >=6.0
-numpy
+numpy; python_version<'3.13'
+numpy>=2.1.0dev0; python_version>='3.13'
 pytest >=6,!=6.1.0,!=7.1.0
 pytest-benchmark
 setuptools_scm[toml] >=3.4,!=4.0.0

pyproject.toml

@@ -35,6 +35,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Programming Language :: Python",
@@ -59,6 +60,7 @@ dev = [
     "pytest-benchmark",
     "pytest>=6.0",
     "typer",
+    "numpy>=2.1.0dev0; python_version>='3.13'",
 ]
 docs = [
     "myst_parser>=0.13",
@@ -80,6 +82,7 @@ test = [
     "hypothesis>=6.0",
     "pytest-benchmark",
     "pytest>=6.0",
+    "numpy>=2.1.0dev0; python_version>='3.13'",
 ]
 
 [project.urls]
@@ -173,7 +176,7 @@ skip = [
   "pp37-*",
   "pp38-*",
 ]
-environment-pass = ["SETUPTOOLS_SCM_PRETEND_VERSION"]
+environment-pass = ["SETUPTOOLS_SCM_PRETEND_VERSION", "PIP_EXTRA_INDEX_URL"]
 environment.PIP_ONLY_BINARY = "numpy"
 environment.PIP_PREFER_BINARY = "1"