update .build.yml file to match snapcraft.yml
ded804e55963 — hindlemail a month ago
try including snapd as a package dep.
54cf4c9aeef5 — hindlemail a month ago
see if snapcraft destructive mode works better on build server.

clone

read-only
https://hg.sr.ht/~hindlemail/mercurialsnappackaging
read/write
ssh://hg@hg.sr.ht/~hindlemail/mercurialsnappackaging
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