Add mka

mka zip
real	1m20.114s
user	1m18.575s
sys	0m0.521s

mka clean
real	0m0.069s
user	0m0.009s
sys	0m0.065s

make zip
real	1m24.511s
user	1m23.269s
sys	0m0.618s

make clean
real	0m0.074s
user	0m0.006s
sys	0m0.068s

The numbers are close enough here that it may just be the placebo effect. Needs double-checking.