dnsrend 0.08 (new formula)

dnsrend is a DNS message dissector, showing excruciating detail to diagnose
malformed message contents.
I can't get it working, so asking for your advice. This sequence of commands fails with the following error:
```
    bin.install "dnsrend"
    doc.install "README"

    (HOMEBREW_PREFIX/"bin/dnsrend").write <<-EOS.undent
    #!/bin/sh
    /usr/bin/env perl -Tw -I "#{libexec}/lib/perl5" #{bin}/dnsrend.pl
    EOS
    chmod 0755, HOMEBREW_PREFIX/"bin/dnsrend"
```

Error: Will not overwrite /usr/local/bin/dnsrend

My understanding is that brew creates automatically a link from bin to HOMEBREW_PREFIX/bin, so my wrapper script cannot be created that way.
Any advice?

Thanks!