Another attempt

.github/workflows/test.yml

@@ -28,7 +28,7 @@ jobs:
           python-version: 3.x
       - name: Build and Install
         run: |
-          python -m pip install ".[rust,dev]"
+          python -m pip install ".[dev]"
       - name: Test
         run: |
           pytest

pyproject.toml

@@ -1,6 +1,6 @@
 [build-system]
 requires = ["maturin>=0.14", "setuptools", "setuptools-rust", "setuptools_scm"]
-build-backend = "setuptools.build_meta"
+build-backend = "maturin"
 
 [tool.setuptools_scm]
 write_to = "src/python/qubed/_version.py"