Dunque: su SimplyMepis (quindi...Debian), ho fatto "su" per abilitarmi come root.
Poi ecco cosa contiene la cartella, e i relativi comandi

root@1[fpix-0.91.0]# cd driver
root@1[driver]# ls
finepix-common.c finepix-jpeg.c finepix-main.c finepix-v4l.c
finepix.h finepix-jpeg.h finepix-v4l2.c Makefile
root@1[driver]# make
The sources for the current kernel have not been found. Aborting.
make: *** [prereq_check] Error 1
root@1[driver]# make install
make -C /lib/modules/2.6.15-27-desktop/build SUBDIRS=/home/paolo/Desktop/fpix-0.91.0/driver modules_install
make: *** /lib/modules/2.6.15-27-desktop/build: No such file or directory. Stop.
make: *** [install] Error 2

Ho inoltre visto che nek file Makefile c'è questa sezione:

prereq_check:
@ if [ ! -f $(KSRC)/include/linux/version.h ]; then \
echo "The sources for the current kernel have not been found. Aborting."; \
exit 1;\
fi