Update build.yml

.github/workflows/build.yml

@@ -25,8 +25,7 @@ jobs:
           python-version: '3.x'
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
-          pip install -r landscape-tools/requirements.txt
+          pip install --no-deps --require-hashes -r landscape-tools/requirements.txt
       - name: Run build
         working-directory: ./landscape
         run: |