Install dpkg-dev as required

.gitlab-ci.yml

@@ -2,7 +2,9 @@ image: stretch_website
 
 before_script:
   - export LANG=en_US.UTF-8
+  - id
   - apt-get update
+  - apt-get install dpkg-dev
   - python3 -m venv venv
   - source venv/bin/activate
   - pip install wheel