nix: rely on propagatedBuild{Inputs,Outputs} for cuda

[SomeoneSerge]

TODO:

• Verify the closure sizes haven't increased

• I have read the contributing guidelines

• Self-reported review complexity:

  • Low
  • Medium
  • High

[philiptaron]

Here's how I tried to find out closure sizes.

$ nix derivation show github:someoneserge/llama.cpp/cuda-propagatedBuildInputs#cuda | jq -r keys[]
/nix/store/vxnjq87z41h3ckilplmgbr7waqf530dl-llama-cpp-cuda-0.0.0.drv
$ nix-build /nix/store/vxnjq87z41h3ckilplmgbr7waqf530dl-llama-cpp-cuda-0.0.0.drv
...
$ nix path-info --closure-size --human-readable /nix/store/vxnjq87z41h3ckilplmgbr7waqf530dl-llama-cpp-cuda-0.0.0.drv^*
/nix/store/mvw7b379xpx31c9hf60ypygv5jpmc9dd-llama-cpp-cuda-0.0.0	   1.0 GiB

So the size for the new version is ~1.0 GiB.

$ nix derivation show github:ggerganov/llama.cpp#cuda | jq -r keys[]
/nix/store/hh7x8cpmdjwj18bgh5qim5kvigpcvvdg-llama-cpp-cuda-0.0.0.drv
$ nix-build /nix/store/hh7x8cpmdjwj18bgh5qim5kvigpcvvdg-llama-cpp-cuda-0.0.0.drv
...
$ nix path-info --closure-size --human-readable /nix/store/hh7x8cpmdjwj18bgh5qim5kvigpcvvdg-llama-cpp-cuda-0.0.0.drv^*
/nix/store/6b1ag2jh7zl5dj0q4a4f6ks4zhx634ih-llama-cpp-cuda-0.0.0	   1.1 GiB

According to this method, the new version is slightly smaller than the old, and everything still builds.

Accepted. ✅