That's because you're including two JDKs, zulu and the one that gradle includes via its jdk argument. Look for gradleGen in nixpkgs to see what I mean.
And sorry for gradle2nix, I'm working on an improvement that's less of a hack.
And sorry for gradle2nix, I'm working on an improvement that's less of a hack.
Don't be. Thanks for your work. Excited to learn about the improvement. Can you tell more about what you have in mind?