Current version of textproc/hs-pandoc in Ports is 3.1.8, which is incompatible with current version of textproc/hs-pandoc-crossref in Ports (0.3.16.0). Version 0.3.17.0 brings Pandoc 3.1.8 compatiblity and other fixes: https://github.com/lierdakil/pandoc-crossref/releases/tag/v0.3.17.0
(In reply to Vedran Miletic from comment #0) Thank you. For future reference, please note that portscout covers cases such as this; <https://portscout.freebsd.org/haskell@freebsd.org.html>
https://cgit.freebsd.org/ports/commit/?id=06203f96e54d2b6a875d978946460e865d786409