fixed-point argument parameter on derivations

**Is your feature request related to a problem? Please describe.** Would be nice if the derivations here supported fixed-point arguments, i.e. `finalAttrs`. **Describe the solution you'd like** This would require reworking the derivations to use `lib.extendMkDerivation` ideally. I played around with this and there is one main blocker: the `stdenv` attribute. **Describe alternatives you've considered** Could roll our own helper, but it is nice to be in-sync with any update to `extendMkDerivation`. **Additional context** Add any other context or screenshots about the feature request here.