@manpacket First of all, no it doesn't. Running both files through strip reduced both by a meg+. Second of all, the filesizes were still 800KB different after that, and still 35KB different after I told Cargo to use codegen_units=1. Third of all, the binaries are less than six megs unstripped, but lastly and most importantly, I want my builds to be reproducible, and if possible I want Cargo and crate2nix to produce identical files so I can know for sure that if something weird happens and I get a bug report, the method the person used to build it isn't at fault.