could nimcache be generated out-of-source (in /tmp) like rdmd does in D?

nim c -r util.nim
creates
util, nimcache

dmd -run util.d doesn't create anything (only in /tmp) which is nice
can be seen with: writeln(thisExePath);
eg:
dmd -run:
/private/var/tmp/dmd_run1WOziZ
rdmd:
/private/var/folders/ll/dtasdfasf30dny4y61tf_80000gn/T/.rdmd-501/rdmd-main.d-B6C80F6AC29F80D70F072890F37AA29E/main
which hashes all compiler options so it'll run instantly on next use

post close TODO

other aspects, eg generate the binary in nimcache, caching the resulting binary