[Rivet] Error with Rivet

[Hafeez Hoorani]

Could you please help with the error below:

./rivet-bootstrap
Getting http://www.hepforge.org/archive/rivet/Rivet-1.8.2.tar.gz
Not overwriting tarball at /afs/cern.ch/user/h/hoorani/public/Rivet/downloads/Rivet-1.8.2.tar.gz
LCG area available: using LCG-built packages
Using LCG platform tag = x86_64-slc5-gcc41-opt
FastJet does not exist at path /afs/cern.ch/sw/lcg/external/fastjet/3.0.3/x86_64-slc5-gcc41-opt. You may wish to use the --ignore-lcgext option
Traceback (most recent call last):
  File "./rivet-bootstrap", line 510, in ?
    sys.exit(1)
SystemExit: 1

Best Regards -- Hafeez
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