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Update doc/builders/fetchers.chapter.md
Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
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@ -23,7 +23,8 @@ fetchurl {
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};
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```
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**This will reuse the old contents**. Remember to invalidate the hash argument by setting the sha256 to an empty string.
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**This will reuse the old contents**.
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Remember to invalidate the hash argument, in this case by setting the `sha256` attribute to an empty string.
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```nix
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fetchurl {
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