Package: pandoc-citeproc Version: 0.8.1.3-1+b1 Pandoc packaged in unstable is at version 1.16.0.2~dfsg-1, but the latest version of pandoc-citeproc is 0.8.1.3-1+b1. That pandoc version requires the latest version of pandoc-citeproc, version 0.9.
Using the current versions in unstable together, I obtain errors pandoc-citeproc: Error in $[2][25]: The key "SoftBreak" was not found