2020-07-22 21:17:48 +00:00
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# Release 1.4 (2013-02-26)
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This release fixes a security bug in multi-user operation. It was
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possible for derivations to cause the mode of files outside of the Nix
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store to be changed to 444 (read-only but world-readable) by creating
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hard links to those files
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([details](https://github.com/NixOS/nix/commit/5526a282b5b44e9296e61e07d7d2626a79141ac4)).
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There are also the following improvements:
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- New built-in function: `builtins.hashString`.
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2020-07-23 12:28:05 +00:00
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- Build logs are now stored in `/nix/var/log/nix/drvs/XX/`, where *XX*
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2020-07-22 21:17:48 +00:00
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is the first two characters of the derivation. This is useful on
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machines that keep a lot of build logs (such as Hydra servers).
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- The function `corepkgs/fetchurl` can now make the downloaded file
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executable. This will allow getting rid of all bootstrap binaries in
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the Nixpkgs source tree.
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- Language change: The expression `"${./path}
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..."` now evaluates to a string instead of a path.
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