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Mention rebuilds in best practices #765

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Oct 19, 2023
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Mention rebuilds in best practices #765

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Mention rebuilds in best practices
zmitchell Oct 18, 2023
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Update source/recipes/best-practices.md
zmitchell Oct 19, 2023
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2 changes: 1 addition & 1 deletion source/recipes/best-practices.md
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Expand Up @@ -216,6 +216,7 @@ The problem is that now your build is no longer reproducible, as it depends on t
That cannot declared in the source code, and results in an impurity.

If someone builds the project in a directory with a different name, they will get a different store path for `src` and everything that depends on it.
This can be the cause of needless rebuilds.

:::{tip}
Use [`builtins.path`](https://nixos.org/manual/nix/stable/language/builtins.html#builtins-path) with the `name` attribute set to something fixed.
Expand All @@ -232,4 +233,3 @@ pkgs.stdenv.mkDerivation {
}
```
:::