Unlike the `pkg` binding in the above example, the `finalAttrs` parameter always references the final attributes. For instance `(pkg.overrideAttrs(x)).finalAttrs.public` is identical to `pkg.overrideAttrs(x)`, whereas `(pkg.overrideAttrs(x)).original` is the same as the original `pkg`.
Unlike the `pkg` binding in the above example, the `finalAttrs` parameter always references the final attributes. For instance `(pkg.overrideAttrs(x)).finalAttrs.finalPackage` is identical to `pkg.overrideAttrs(x)`, whereas `(pkg.overrideAttrs(x)).original` is the same as the original `pkg`.
See also the section about [`passthru.tests`](#var-meta-tests).
@ -48,7 +48,7 @@ In the above example, the `separateDebugInfo` attribute is overridden to be true
The argument `previousAttrs` is conventionally used to refer to the attr set originally passed to `stdenv.mkDerivation`.
The argument `finalAttrs` refers to the final attributes passed to `mkDerivation`, plus the `public` attribute which is the result of `mkDerivation` — the derivation or package.
The argument `finalAttrs` refers to the final attributes passed to `mkDerivation`, plus the `finalPackage` attribute which is equal to the result of `mkDerivation` or subsequent `overrideAttrs` calls.
If only a one-argument function is written, the argument has the meaning of `previousAttrs`.
# separate lines, because Nix would only show the last line of the comment.
# An infinite recursion here can be caused by having the attribute names of expression `e` in `.overrideAttrs(finalAttrs: previousAttrs: e)` depend on `finalAttrs`. Only the attribute values of `e` can depend on `finalAttrs`.