Thanks to Brian and Matthias Kilian, hopefully the attached tgz is better. Fixes: no revision number, homepage removed because it was uninformative, PLIST fixed (I think -- not sure about this), license changed to BSD.
Happy for any further feedback which I'll apply to the other 50+ ports on the way through to hledger.
hs-Diff.tgz
Description: application/gtar-compressed