A plea for int overflow checking as the default

I have a problem Nemo on my computer (with Julia 0.6, on ubuntu). It complains that

error compiling init: could not load library “/home/jmichel/.julia/v0.6/Nemo/local/lib/libflint”

while I do have flint installed on my ubuntu machine…

I managed to install Nemo on another machine. Replacing this time 1 by ZZ(1):

-It does not support n&1, I had to use n%2
-It is even slower than BigInt (by about 15%)