x="$(readlink -f "$BASH_SOURCE")"; cd ${x%/*}
-echo install mount-latest-subvol check-subvol-stale /usr/local/bin
-install mount-latest-subvol check-subvol-stale /usr/local/bin
+e() { echo "$*"; "$@"; }
+
+# scripts that would interfere with unmounting /a, put them elsewhere
+e install mail-cert-cron mount-latest-subvol check-subvol-stale /usr/local/bin