Pls. remove that ebuild or update it. (Current upstream version 3.2.1 as of Sep 7, 2021)
please note, that 3.0.0 is incompatible with the old repo format. I suggest we still keep the old ebuild next to the new one and add a warning note. https://github.com/dpc/rdedup/blob/master/CHANGELOG.md
Created attachment 887838 [details, diff] rdedup.patch Attached a patch, not going to finish it as I don't want to faff with checking if the licence name is right and such. Feel free to carry it on. (S-o-b.)