I am in /usr/src/zaptel-1.2.7   
now when I do "make clean"
I get this error

[root@localhost zaptel-1.2.7]# make clean
Makefile:176: target `ztdummy.o' given more than once in the same rule.
rm -f torisatool makefw tor2fw.h radfw.h
rm -f ztcfg torisatool makefw ztmonitor ztspeed  zttest fxotune
rm -f *.o ztcfg tzdriver sethdlc sethdlc-new
rm -f zonedata.lo tonezone.lo libtonezone.so *.lo
make -C  SUBDIRS=/usr/src/zaptel-1.2.7 clean
make: *** SUBDIRS=/usr/src/zaptel-1.2.7: No such file or directory.  Stop.
make: *** [clean] Error 2