Revert "overrideDerivation: Re-attatch passthru and meta to all outputs"

This reverts commit 6b0e94a516c5aa8d0e18e13028c7ccf541062c99.

It still breaks VM builds: http://hydra.nixos.org/build/4858140
Revert "Revert "Revert "overrideDerivation: Simplify"""

This reverts commit c2b1ca029663d1ad41bbffd3d09becada06c74cc.

It still breaks VM builds: http://hydra.nixos.org/build/4858140