Yes you can! but it's very slow

  $ ./jqjq "eval($(jq -Rs . jqjq.jq)+.)" <<< '"eval(\"def f: 
  1,8; [f,f] | map(.+105) | implode\")"'
  "jqjq"

But running jqjq in jqjq in jqjq runs out of memory so don't know if that works yet :)