Clojure is tied very strongly to the Java toolchain (note "toolchain" rather than "ecosystem"). The packaging system and package managers use Maven and Java jar

Clojure is tied very strongly to the Java toolchain (note "toolchain" rather than "ecosystem"). The packaging system and package managers use Maven and Java jars instead of a clojure-based one. This means that promising projects like Clojure CLR have no chance of taking off the ground, unlike say Ruby vs Jruby vs Ruby EE vs Rubinius.