update .build.yml file to match snapcraft.yml
try including snapd as a package dep.
see if snapcraft destructive mode works better on build server.
1. download mercurial tar and extract 2. update snap/snapcraft.yaml file. a. version b. source name. 3. run snapcraft. 4. tag repo. === Example: wget https://www.mercurial-scm.org/release/mercurial-6.1.tar.gz tar -xvzf mercurial-6.1.tar.gz update version to '6.1' update parts->mercurial->source to 'mercurial-6.1.tar.gz' snapcraft clean mercurial snapcraft hg tag 6.1 === General trouble shooting: multipass instances are stored at: /var/snap/multipass/common/data/multipassd/vault/instances