You can check how much space is left in your temporary directory using df
;
df -h /tmp
You may be able to change the temporary path by setting TMPDIR
in your environment;
TMPDIR=/new/temporary/path beet
If that works, you can permanently set it by adding this to your .bashrc
in your home directory.
export TMPDIR=/new/temporary/path
Although this may affect other software using SQLite too.