[plt-scheme] define-values/invoke-unit/infer failing

(define-compound-unit/infer runner@
  (import)
  (export run^)
  (link foo@
        bar@
        baz@
        thelma@
        louise@
        bonny@
        something-that-provides-run@))

(define-values/invoke-unit/infer runner@)

ERROR:
vector->values: index 6 out of range [0, 3] for vector: #(#<procedure>
#<procedure> #<procedure> #<procedure>)

Any reason I might be running into that error? ._. I can't for some
reason define-values/invoke-unit/infer my unit. It just gives me that
weird error.