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