Except you lose the multi-file happiness of xargs

\nfor file in  `find . -iname somefilename.txt`\n\tdo\n\t\tfor pattern in `awk -F, '{ print $1 }' thing.txt find_file_pat.txt`\n\t\t\tdo\n\t\t\t\tgrep  $pattern $file\n\t\t\tdone\n\tdone\n