diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
@@ -33,7 +33,6 @@ jobs:
      - name: Prepare
        shell: bash
        run: |
-          python -m pip install -U pip
          python -m pip install -r requirements.txt pytest

      - name: Build
@@ -55,8 +54,7 @@ jobs:
      - name: build packages
        shell: bash
        run: |
-          pip install build
-          python -m build

      - name: upload packages
        uses: actions/upload-artifact@v4

diff --git a/MANIFEST.in b/MANIFEST.in
@@ -1,5 +1,5 @@
include setup.py
include COPYING
include README.md
-recursive-include msgpack *.h *.c *.pyx *.cpp
recursive-include test *.py
diff --git a/pyproject.toml b/pyproject.toml
@@ -1,5 +1,5 @@
[build-system]
-requires = ["setuptools >= 80.9.0"]
build-backend = "setuptools.build_meta"

[project]

diff --git a/requirements.txt b/requirements.txt
@@ -1 +1,3 @@
Cython==3.1.4