Upload of big artifact fails

I'm trying to build boost with gitlab-ci

The build runs fine, but at the upload of the artifact the following error appears

$ move boost/stage/%B2_TOOLSET%-%B2_ADDRESS_MODEL% dist/
        1 dir(s) moved.
Uploading artifacts...
dist/*: found 314 matching files                   
ERROR: Uploading artifacts to coordinator... too large archive  id=1337 token=xxxxxx
FATAL: Too large                                   

ERROR: Build failed: exit status 1

I suspect, that the files are too large (about 2.5GB in size). Where should I look to what produces this error? Could it be nginx? is is some limitation from gitlab-runner?

PS: gitlab is installed on Ubuntu 16.04 with omnibus install