What does this do exactly? Will it permanently change lein to use drip? Or only temporarily for whichever command replaced the "...". Also, do you know if the advice here: https://github.com/flatland/drip/wiki/Clojure
works with lein2?
That command runs drip only for that particular invocation of the command. You can put the following:
export JAVA_CMD=drip
into your ~/.profile (etc) file to have it affect all future Java launches from leiningen.