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doc/using/overrides: Relate addition to preceding text

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Robert Hensing 2023-07-01 15:25:17 +02:00 committed by GitHub
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doc/using/overrides.chapter.md
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@ -58,13 +58,15 @@ The argument `finalAttrs` refers to the final attributes passed to `mkDerivation
If only a one-argument function is written, the argument has the meaning of `previousAttrs`.
Function arguments can be omitted entirely if there is no need to access `previousAttrs` or `finalAttrs`.
```nix
helloWithDebug = pkgs.hello.overrideAttrs {
separateDebugInfo = true;
};
```
In the above example, the `separateDebugInfo` attribute is overridden to be true, thus building debug info for `helloWithDebug`. Function arguments can be omitted if there is no need to access previousAttrs or finalAttrs.
In the above example, the `separateDebugInfo` attribute is overridden to be true, thus building debug info for `helloWithDebug`.
::: {.note}
Note that `separateDebugInfo` is processed only by the `stdenv.mkDerivation` function, not the generated, raw Nix derivation. Thus, using `overrideDerivation` will not work in this case, as it overrides only the attributes of the final derivation. It is for this reason that `overrideAttrs` should be preferred in (almost) all cases to `overrideDerivation`, i.e. to allow using `stdenv.mkDerivation` to process input arguments, as well as the fact that it is easier to use (you can use the same attribute names you see in your Nix code, instead of the ones generated (e.g. `buildInputs` vs `nativeBuildInputs`), and it involves less typing).