# Test books (a few KB each, every journal append synced) go in the system
# temp dir, /tmp, even when TMPDIR points elsewhere: `just mutants*` sets
# TMPDIR to ~/.cache for cargo-mutants' multi-GB tree copies, and cargo
# passes [env] to the tests it runs, not to cargo-mutants itself. On disk
# the synced appends made each mutant's tests several times slower.
[env]
TMPDIR = { value = "/tmp", force = true }