Just tried to modify clojure-aligns to work with let-flow from manifold.deferred with

(add-to-list 'clojure-align-binding-forms "let-flow")

@callum I have to check the code. Maybe it’s an oversight of ours, as all the default forms are in the core namespace.

You can file a ticket in clojure-mode, so we won’t forget to look into this.