Fix: add to the build step

.gitlab-ci.yml

@@ -25,8 +25,8 @@ build-job:       # This job runs in the build stage, which runs first.
   image: python:3.11-alpine3.19
   script:
     - echo "Installing dependencies..."
-    - pip install setuptools
     - pip install -r requirements.txt
+    - pip install --upgrade build
     - echo "Compiling the code..."
     - python -m build
     - echo "Compile complete."