Discord mimetype issue with version bump

I used to have an issue with URLs in the discord package not opening in the browser and I fixed this 2 months ago by adding the mimeType property to the build file. However now that the package version has been bumped from 0.0.98 -> 0.0.102 the issue is back. I’ve tried installing the package from both nixos-unstable, nixpkgs-unstable and building the package myself from the nixpkgs github repos master branch all three of which contain my mimeType fix, but for some reason, after this version bump the URL issue persists.