The update needs to happen _inside_ the manylinux build container.

.github/workflows/distribute_package.yml

@@ -66,14 +66,6 @@ jobs:
           python -m pip install --upgrade pip
           pip install -r requirements.txt
 
-      # setuptools_scm workaround for https://github.com/pypa/setuptools_scm/issues/455
-      - name: Disable local version identifier on develop CI
-        if: github.ref == 'refs/heads/dev'
-        run: |
-          echo 'local_scheme = "no-local-version"' >> pyproject.toml
-          git diff --color=always
-          git update-index --assume-unchanged pyproject.toml
-
       # Used to host cibuildwheel
       - uses: actions/setup-python@v5
         with:
@@ -87,7 +79,9 @@ jobs:
         env:
           CIBW_BUILD: ${{ matrix.python[0] }}-${{ matrix.platform_id }}*
           CIBW_TEST_COMMAND: python -W default -m unittest discover --start-directory {project}/tests
-
+          # setuptools_scm workaround for https://github.com/pypa/setuptools_scm/issues/455
+          CIBW_BEFORE_BUILD: ${{ github.ref == 'refs/heads/dev' &&  'echo ''local_scheme = "no-local-version"'' >> pyproject.toml\n git diff --color=always\n git update-index --assume-unchanged pyproject.toml\n' || '' }}
+
       # Upload the results
       - uses: actions/upload-artifact@v4
         with: