make build-master fail in .gitlab-ci.yml by adding if statement

.gitlab-ci.yml

@@ -24,10 +24,10 @@ build-master:
   <<: *build-package 
   stage: build
   after_script:
-    - eval $(cat ENVIRONMENTS)
+    # eval $(cat ENVIRONMENTS)
     - mkdir build
     - ls ../
-    - mv ../${PKGNAME}_${VERSION}_${ARCH}.deb build/
+    - if ! mv ../${PKGNAME}_${VERSION}_${ARCH}.deb build/; then exit 1; fi
   artifacts:
     paths:
       - build/*