An Elvish module for finding a writable tmpfs.
epm:install github.com/chlorm/elvish-tmpfs
use github.com/chlorm/elvish-tmpfs/tmpfs
# Optional
use github.com/chlorm/elvish-tmpfs/automount
On Windows this unconditionally installs a batch script to wipe %TEMP% on startup.