> “guix build --rounds=N” builds the package N times if it hasn’t already
> been built.  With grafts enabled this would be the graft derivation,
> which isn’t very useful.
>
> If the package has previously been built, however, it won’t rebuild the
> package.  That’s why we have “--check”.

I think the above information, especially the part about the --check
flag, should go into the manual under "Submitting Patches". Currently,
there is no mention of the --check flag.

WDYT?