diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 034e5e0f4..995b6f3f7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -243,11 +243,13 @@ jobs:
       run: |
          pip install --upgrade --upgrade-strategy eager numpy scipy matplotlib numexpr setuptools cython pytest tqdm
     - name: Install pynbody
-      if: ${{ matrix.REQUIRES_PYNBODY }}
+      if: ${{ matrix.REQUIRES_PYNBODY && ( matrix.python-version == '3.11' || matrix.python-version == '3.10' || matrix.python-version == '3.9' ||  matrix.python-version == '3.8' || matrix.os != 'ubuntu-latest' ) }}
       run: |
          pip install --upgrade --upgrade-strategy eager h5py pandas pytz
          pip install --upgrade --upgrade-strategy eager wheel
          pip install --upgrade --upgrade-strategy eager pynbody
+    - name: Install pynbody
+      if: ${{ matrix.REQUIRES_PYNBODY && matrix.python-version == '3.12' && matrix.os == 'ubuntu-latest' }}
     - name: Install astropy
       if: ${{ matrix.REQUIRES_ASTROPY }}
       run: pip install astropy pyerfa