nix build fails with code 1, but build results are in the nix store

[MatrixManAtYrService]

First of all, thanks for making this. I think it will be useful. I'm not a nix expert and I'm very new to nim, so please forgive me if I'm asking in the wrong place here.

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I want to use nimble2nix with nimwave starter. I've integrated the two with this commit.

When I run nix build, I see error: builder for '/nix/store/nhnbqrvxydzlyn352mml54y71h8j5chl-nimwave_starter-0.1.drv' failed with exit code 1 (logs here)

When I dig through those logs, I see references to this file: /nix/store/...-nimwave_starter-0.1/bin/tui which I can run, and it works as expected.

I guess the tui build target is succeeding and the gui target is failing, and since one of the two is failing, nix build is failing. From the nimwave_starter readme, these are typically built with separate commands:

nimble build tui -d:release
nimble build gui -d:release --app:gui

How can I make these into separate flake outputs so that I can use nix build and nix run on the one that works without getting tangled up with the one that doesn't?