Snapcraft 7.2.3 When using Multipass as the build environment and core22 as the base, the project directory is mounted into /root/project without any uid/gid mappings, so it end up being owned by ubuntu:ubuntu, as opposed to root:root when using core20 as the base. # build default core20 snap with multipass as build environment snapcraft init export SNAPCRAFT_BUILD_ENVIRONMENT=multipass snapcraft # project directory mounted with proper uid/gid mappings multipass exec snapcraft-my-snap-name -- sudo ls -ld /root/project drwxr-xr-x 1 root root 4096 Oct 31 16:05 /root/project # build same snap with core22 sed -i s/core20/core22/ snap/snapcraft.yaml snapcraft # no more uid/gid mappings for mounted directory multipass exec snapcraft-my-snap-name-on-amd64-for-amd64-133985 -- sudo ls -ld /root/project drwxr-xr-x 2 ubuntu ubuntu 4096 Oct 31 15:59 /root/project