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7577d2d3ae
The method tested for in the previous commit is now deprecated. Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
11 lines
691 B
Markdown
11 lines
691 B
Markdown
---
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synopsis: Deprecate manually making structured attrs with `__json = ...;`
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prs: [13220]
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---
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The proper way to create a derivation using [structured attrs] in the Nix language is by using `__structuredAttrs = true` with [`builtins.derivation`].
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However, by exploiting how structured attrs are implementated, it has also been possible to create them by setting the `__json` environment variable to a serialized JSON string.
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This sneaky alternative method is now deprecated, and may be disallowed in future versions of Nix.
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[structured attrs]: @docroot@/language/advanced-attributes.md#adv-attr-structuredAttrs
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[`builtins.derivation`]: @docroot@/language/builtins.html#builtins-derivation
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