default_pre_build && cd $SOURCE_DIRECTORY && sedit "s:^PREFIX.*:PREFIX= ${INSTALL_ROOT}/usr:" config.mk && sedit "s:^CFLAGS = -Os \(.*\):CFLAGS = \1 $CFLAGS:" config.mk && sedit "s:^LDFLAGS = \(.*\):LDFLAGS = \1 $LDFLAGS:" config.mk