Remember how to use apt

.gitlab-ci.yml

@@ -6,7 +6,7 @@ stages:
 
 before_script:
     - apt-get update
-    - apt-get install cmake
+    - apt-get install cmake --yes
     - rustup toolchain add $toolchain
     - if [ $redox ]; then rustup target add x86_64-unknown-redox --toolchain $toolchain; fi
     - rustup show