Glossary

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.	https://nixos.wiki/wiki/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