Our experience shows that hiring people for a Clojure(Script) project is relatively easy (in Oslo, Norway) despite a market where demand exceeds supply. But it is important to use the right channels to reach the right people.
We got about 15 local candidates within a very short time. A few with production Clojure(Script) experience, most with hobby experience, a few with none. A few of them were really experienced people. All wanted to join us because of our language choice. All seemed quite passionate.
All but one came from the Oslo Clojure Meetup. The international mailing list yielded one candidate plus a few foreigners willing to move to Norway (if we provided visa sponsorship) and a few people from Norway living outside of Oslo (and not willing to move).
The economies of Scala hypothesis, i.e. that it is easier to hire for a niche language with passionate user base than for a mainstream language, seems to hold. But it is crucial to use the right channels to reach relevant people.