diff --git a/.github/workflows/regression_test.yml b/.github/workflows/regression_test.yml
index a779f6cf0..971515747 100644
--- a/.github/workflows/regression_test.yml
+++ b/.github/workflows/regression_test.yml
@@ -67,5 +67,5 @@ jobs:
         pip install ${{ matrix.torch-spec }}
         pip install -r requirements.txt
         pip install -r dev-requirements.txt
-        python setup.py install
+        pip install .
         pytest test --verbose -s
diff --git a/pyproject.toml b/pyproject.toml
deleted file mode 100644
index edf5df139..000000000
--- a/pyproject.toml
+++ /dev/null
@@ -1,3 +0,0 @@
-[build-system]
-requires = ["setuptools", "wheel", "ninja", "torch"]
-build-backend = "setuptools.build_meta"