Trying to fix CI...

.gitlab-ci.yml

@@ -9,7 +9,7 @@ job:
         - apt-get install -y -V make
         - apt-get install -y -V cmake
         - apt-get install -y -V libboost-test-dev
-        - apt-get install -y -V build-essentials
+        - apt-get install -y -V build-essential
         - apt-get install -y -V g++-5
         - ./build.sh