I've gone ahead and fixed the issue, which turned out to be bigger than just the null. Came down to a lein compatibility issue with a previous patch. From now on any version of lein-package that starts with 2.0.* will be lein 2.0 compatible, and versions starting with 2.1.* will be lein 2.1 compatible. Thanks for pointing all of this out.
I've gone ahead and fixed the issue, which turned out to be bigger than just the null. Came down to a lein compatibility issue with a previous patch. From now on any version of lein-package that starts with 2.0.* will be lein 2.0 compatible, and versions starting with 2.1.* will be lein 2.1 compatible. Thanks for pointing all of this out.