diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
index ade60a1d..ede5ca8f 100644
--- a/.github/workflows/cibuildwheel.yml
+++ b/.github/workflows/cibuildwheel.yml
@@ -46,6 +46,7 @@ jobs:
           python -c "import cftime; print(f'cftime v{cftime.__version__}')" &&
           python -m pip install check-manifest cython pytest pytest-cov &&
           python -m pytest -vv {package}/test
+        CIBW_BUILD_FRONTEND: 'pip; args: --pre --extra-index-url "https://pypi.anaconda.org/scientific-python-nightly-wheels/simple"'
 
     - uses: actions/upload-artifact@v3
       with:
diff --git a/.github/workflows/tests_conda.yml b/.github/workflows/tests_conda.yml
index 0e0275cc..c8198aa5 100644
--- a/.github/workflows/tests_conda.yml
+++ b/.github/workflows/tests_conda.yml
@@ -17,7 +17,7 @@ jobs:
         platform: [x64, x32]
         experimental: [false]
         exclude:
-          - os: macos-latest  
+          - os: macos-latest
             platform: x32
         include:
           - python-version: "3.12"
diff --git a/.github/workflows/tests_latest.yml b/.github/workflows/tests_latest.yml
index 3090bf03..b8ecec3f 100644
--- a/.github/workflows/tests_latest.yml
+++ b/.github/workflows/tests_latest.yml
@@ -28,11 +28,11 @@ jobs:
           --index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple/ \
           --trusted-host pypi.anaconda.org \
           --no-deps --pre --upgrade \
-          numpy
+          "numpy>=2.0.0.dev0"
 
     - name: Install cftime
       run: |
-        python -m pip install .
+        python -m pip install --no-build-isolation .
 
     - name: Test cftime
       run: |