Hi, I’m pleased to announce the availability of Nix 2.30. It is available from releases.nixos.org. Release notes Backward-incompatible changes and deprecations build-dir no longer defaults to $TMPDIR The directory in which temporary build directories are created no longer defaults to TMPDIR or /tmp, to avoid builders making their directories world-accessible. This behavior allowed escaping the build sandbox and can cause build impurities even when not used maliciously. We now default to bui...