vfs::unmount /kit
	}
	"zip" {
		set kitfd [open $kitfile a+]
		fconfigure $kitfd -translation binary

		cd $vfsdir
		if {$tcl_platform(platform) eq "windows"} {
			set null NUL
		} else {
			set null /dev/null
		}
		set zipfd [open "|zip -r - [glob *] 2> /dev/null"]
		set zipfd [open "|zip -r - [glob *] 2> $null"]
		fconfigure $zipfd -translation binary

		fcopy $zipfd $kitfd

		close $kitfd
		if {[catch {
			close $zipfd