modifing the minimo's Makefile ...

Hello all,

I'm implementing some new features on the minimo-mozilla browser , but to
get no compile error running de ./package.sh (into
mozilla/embedding/minimo/app), i'm modifing manualy the Makefile into this
folder. I'm increasing the following line into it:

REQUIRES        = gtkembedmoz \
                  xpcom \
                  string \
                  dom \
                chrome \
                locale \
                webbrowserpersist \
                find \
                docshell \
                webshell \
                widget \
                content \
                browser \
                necko \
                pref \
                history \
                gfx \
                webbrowserpersist \
                layout \
                webbrwsr \
                history \
                txtsvc \
                windowwatcher \
                appcomps \
                xpcom \
                nspr \
                xpcom_obsolete \
                $(NULL)

Now, it's working fine. But i want to know how can I create this file
(mozilla/embedding/minimo/app/Makefile) with this modifying during the
'make -f client.mk build_all' automatically !??

Thanks in advance...