### Bug Description I'm on 22.04, trying to build a core20 snap, and snapcraft fails to launch a `snapcraft` instance. Turns out it doesn't exist after snapcraft finished configuring multipass: ``` ~/grafana-agent-snap> snapcraft Support for 'multipass' needs to be set up. Would you like to do it now? [y/N]: y snapd is not logged in, snap install commands will use sudo multipass 1.14.1 from Canonical✓ installed Waiting for multipass... Launching a VM. launch failed: Remote "snapcraft" is unknown or unreachable. If image mirror is enabled, please confirm it is valid. An error occurred with the instance when trying to launch with 'multipass': returned exit code 2. Ensure that 'multipass' is setup correctly and try again. ~/grafana-agent-snap> multipass list No instances found. ``` Moreover, the multipass instance name isn't "snapcraft" but rather "snapcraft-<snap_name>": ``` ~/grafana-agent-snap> snapcraft Launching a VM. Build environment is in unknown state, cleaning first. info failed: The following errors occurred: instance "snapcraft-grafana-agent" does not exist Launched: snapcraft-grafana-agent ``` ### To Reproduce From a host that doens't have multipass pre-installed: ```bash git clone https://github.com/canonical/grafana-agent-snap.git cd grafana-agent-snap ./make-classic.sh snapcraft ``` ### Environment Ubuntu 22.04.5 Snapcraft 8.4.4 (12961) ### snapcraft.yaml ```yaml name: grafana-agent version: '0.40.4' summary: A telemetry collector for sending metrics, logs, and trace data license: Apache-2.0 contact: simon.aronsson@canonical.com issues: https://github.com/canonical/grafana-agent-snap/issues source-code: https://github.com/canonical/grafana-agent-snap website: https://grafana.com description: "Grafana Agent is a telemetry collector for sending metrics, \nlogs, and trace data to the opinionated Grafana observability stack.\n" base: core20 grade: stable confinement: classic compression: lzo apps: grafana-agent: daemon: simple command: agent-wrapper install-mode: disable restart-condition: on-failure architectures: - build-on: amd64 - build-on: arm64 parts: wrapper: plugin: dump source: ./snap/local source-type: local override-build: | cp agent-wrapper.classic $SNAPCRAFT_PART_INSTALL/agent-wrapper grafana-agent: plugin: go source: https://github.com/grafana/agent source-type: git source-tag: "v0.40.4" build-snaps: - go/1.22/stable build-packages: - build-essential - libsystemd-dev stage-packages: - libsystemd0 override-build: | export USE_CONTAINER=0 export GOFLAGS="-mod=readonly -tags=promtail_journal_enabled" make agent agentctl cp build/grafana-agent $SNAPCRAFT_PART_INSTALL/agent cp build/grafana-agentctl $SNAPCRAFT_PART_INSTALL/agentctl ``` ### Relevant log output ```shell (Inlined in bug description) ``` ### Additional context _No response_