The Appveyor run in #262 failed during setup with ``` Preparing to unpack /tmp/singularity-ce.deb ... Unpacking singularity-ce (4.1.1-focal) ... dpkg: dependency problems prevent configuration of singularity-ce: singularity-ce depends on fuse2fs; however: Package fuse2fs is not installed. dpkg: error processing package singularity-ce (--install): dependency problems - leaving unconfigured Processing triggers for man-db (2.9.1-1) ... Errors were encountered while processing: singularity-ce Command exited with code 1 Running "on_finish" scripts ``` Adding this dependency should resolve the issue.