FILE=$DOCKER_HOME/images/$1.mk
if [ ! -e $FILE ]; then
    FILE="$(mktemp)"
    cat <<- EOF > $FILE
        include \$(DOCKER_HOME)/build/Makefile
        FROM = base:squash
        NAME = $1
        VERSION = latest
        build: prepare $1
EOF
fi
make -Bnd -f $FILE build > $1.mk
cat $1.mk | make2graph | dot -Tpng -o $1.mk.png
cat $1.mk | make2graph -f x > $1.mk.xml
rm $FILE