Error in running "make install"

I run make to build the source but then when I run make install, I got the following errors:

wyattwong@WyattsMacBookPro cc65 % make install
BUILD_ID: Git e5f4ca6
install -d /bin
install: chmod 755 /bin: Operation not permitted
install ../bin/* /bin
install: /bin/ar65: Operation not permitted
make[1]: *** [Makefile:115: install] Error 71
make: *** [Makefile:6: install] Error 2
wyattwong@WyattsMacBookPro cc65 %

What am I missing ?