my $buildcmd    = "/path/to/foo/binary";   
my @buildcmd = ( '-p', $workpath,
                 '-P', $workpath,
                 '-H', $pl_url,
                 "--maxdepth=@{[$maxd < 3 ? $maxd : 2]}");
push @buildcmd, "--bpp=$bpp" if $bpp;
push @buildcmd, "--$compr-compression" if $compr;
push @buildcmd, ('-N', $title,
                 '-V3',
                 '-f', "$workpath/$md5file");