FC3 : Unable to build new kernel 2.6.12-1.1376

[gaetan yavorsky]

Hi all,
FC3 fresh install then yum update.
The new kernel 2.6.12-1.1376_FC3smp is installed.
I got the kernel-2.6.12-1.1376_FC3.src.rpm
rpm -ivh kernel-2.6.12-1.1376_FC3.src.rpm is OK
cd /usr/src/redhat/SPECS
rpmbuild -ba --target=i686 kernet-2.6.spec rises the following error :

Not enough random bytes available. Pleaes do some other work to give the
OS a chance to collect more entropy! (Need 269 more bytes)

First time I see this message !
Any idea ?

Thanks
Gaetan