Official docker images with up to date snapcraft are provided on dockerhub here: https://hub.docker.com/r/snapcore/snapcraft But those images are all based on xenial (Ubuntu 16.04) and can't be used to build snaps based on core18 A manual fix is shown here by effectively replacing the `FROM` field with a bionic field https://snapcraft.io/docs/t/creating-docker-images-for-snapcraft/11739 It would be awesome if snapcraft core18 docker images would be provided by canonical instead of everyone by himself This would make it easier to use any cloud provider like gitlab-ci, travis-ci to create and publish snaps to the snapstore (not just for github users).