Figwheel doesn't like the `lein install` approach

Figwheel errored me out with the lein install approach. I want to send http requests from the client, so I chose to use the JS Fetch API. Lambda Island made a fetch ClojureScript wrapper, so I (thought I) installed it, but on an attempted recompile, it says: “No such namespace: lambdaisland/fetch, could not locate lambdaisland_SLASH_fetch.cljs…”.