system "/usr/local/bin/unzip /home/mysite/zips/$zipfile -d /home/mysite/unzips";

##</code><code>##

system "/usr/local/bin/unzip",
          "/home/mysite/zips/$zipfile",
          "-d", "/home/mysite/unzips";

##</code><code>##

{
   local $ENV{'PATH'} = '';
   system "/usr/local/bin/unzip",
             "/home/mysite/zips/$zipfile",
             "-d", "/home/mysite/unzips";
}

##</code><code>##

{
   local $ENV{'PATH'} = '/usr/local/bin:/usr/bin';
   system "unzip",
             "/home/mysite/zips/$zipfile",
             "-d", "/home/mysite/unzips";
}