ref: 19535ffd6a03602cf0fcb4d78a2a89c4f494d859
dir: /mkfile/
UPSTREAM='https://github.com/cc65/cc65.git'
all clean nuke install:V: upstream bind
	@{
		cd upstream && mk $target
	}
upstream:D: /bin/git/clone
	git/clone $UPSTREAM upstream
bind:V: upstream overlay
	if(! test -e upstream/mkfile)
		overlay mkfiles upstream
	if not
		status=''
unbind:V: upstream overlay
	overlay -u mkfiles upstream