Try 2

.gitlab-ci.yml

@@ -17,7 +17,7 @@ before_script:
   - echo "Before script section"
   - echo "For example you might run an update here or install a build dependency"
   - echo "Or perhaps you might print out some debugging details"
-  - export APT_CACHE_DIR=`pwd`/.cache/apt && mkdir -pv $APT_CACHEDIR
+  - export APT_CACHE_DIR=`pwd`/.cache/apt && mkdir -pv $APT_CACHE_DIR
   - export NPM_CONFIG_CACHE=APT_CACHE_DIR=`pwd`/.cache/npm && mkdir -pv $NPM_CONFIG_CACHE
   - dpkg --add-architecture i386
   - apt-get update