Glossary

From NixOS Wiki

NixOS/Nix/Nixpkgs/Nix* slang terms and common abbreviations

See the Nix glossary: https://nixos.org/manual/nix/unstable/glossary.html

Nix* specific terms
Term Explanation Link
Hydra The CI for nixpkgs https://hydra.nixos.org
ofborg A github bot automating CI and other things https://github.com/NixOS/ofborg
Nix* specific abbreviations
Abbreviation Full version Explanation Link
CA Content-addressed If a derivation is Content Addressed it means that the hashes in the paths of its outputs are generated by the outputs contents. Ca-derivations
FOD Fixed output derivation A derivation where it is ensured by means of a hash that the output is fixed. Often, these are source tarballs.
IFD Import From Derivation Using the result of a derivation in a nix expression. https://blog.hercules-ci.com/2019/08/30/native-support-for-import-for-derivation/
NUR Nix User Repository A community driven meta-repository of user maintained packages. https://github.com/nix-community/NUR
ZHF Zero hydra failures As part of the release cycle, there is a time where nixpkgs maintainers try to minimise the number of build errors. ZHF is the goal of this process.
Non-Nix* specific abbreviations that are used heavily in the Nix* ecosystem
Abbreviation Full version Nix*-specific explanation
r13y Reproducibility The same derivation should produce the same output every time it is instantiated
TOFU Trust on first use Trust the hash of a source for the first time when you fetch it, and fix it in the nix expression
LGTM Looks Good To Me Often left as a comment on PRs