using [lein-sassc "0.10.4"] and this lein prep task :

:prep-tasks ["compile" ["cljsbuild" "once" "min"]
                      ["sassc" "once"]]

heroku tries to run it but it fails with Uberjar aborting because jar failed: Cannot run program "sassc": error=2, No such file or directory

yeah sassc wouldn't be available on heroku, you could build the jar locally, and then check it into git instead of building on heroku

and you'd need to update your Procfile to just run the jar instead of building

ok thanks @U050CBXUZ / found this build pack but it doesnt seem to work https://github.com/djmattyg007/heroku-buildpack-sassc

> you could build the jar locally, and then check it into git instead of building on heroku we are doing that^ currently, just wanted to see if there was a way to avoid checking in a site.scss and a site.css

darn -_-

ah I see, I haven't used heroku too much myself so only have a passing familiarity 🙂