try with explicity cat statement

.github/workflows/tests.yaml

@@ -19,9 +19,8 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -U pip wheel
-          pip install flake8 pytest numpy==1.23.5
-          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+          pip install flake8 pytest
+          if [ -f requirements.txt ]; then cat requirements.txt | xargs -L1 pip install; fi
       - name: Lint with flake8
         run: |
           # stop the build if there are Python syntax errors or undefined names