This appears to be a consequence of following dependency tree:
... that is: it's unify that's broken, being pulled in through core.contracts.
New versions of core.unify and core.contracts have been released that fix the issue.
Thanks Alex. That fixed this issue, a very old version of CLJS is now failing the 'ns' spec.
I'll make time to update. (progress: https://github.com/typedclojure/core.typed/pull/105)
Fixed in 0.3.25.