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----
-title: "Lets Learn Nix Caching"
-date: 2020-03-17T18:05:38Z
-draft: true
----
-
-## TL;DR
-
-1. I use `NixOS/nixpkgs-channels` instead of `NixOS/nixpkgs` and avoid
-   `nix-channel`.
-
-## More information
-
-- By default the Nix package manager uses cache.nixos.org as a binary cache.
-- Visit status.nixos.org
-- `git clone git@github.com:NixOS/nixpkgs-channels` instead of
-  `NixOS/nixpkgs`. The former mirrors the latter and uses Git branches to track
-  the published channels.
-
-## What is a Nix channel
-
-If you run...
-
-```shell
-$ git clone git@github.com:NixOS/nixpkgs ~/nixpkgs
-$ export NIX_PATH="nixpkgs=$(realpath ~/nixpkgs)"
-```
-
-One benefit to cloning nixpkgs is that you can browse the source code on your
-machine using tools like `git` and `emacs`. You can also experimentally patch
-and test Nix code this way.
-
-If any of the above appeals to you, clone `nixpkgs-channels` instead.
-
-The Nix maintainers build and test the commits from `nixpkgs` using Hydra. Tests
-include reproducibility tests, etc.
-
-Various channels have different verification phases.
-
-The cache at cache.nixos.org is populate the cache at cache.nixos.org.
-
-You want to increase the likelihood that you are hitting this cache. For
-example, `google-chrome` takes hours to build.
-
-## What is a binary cache?
-
-## What is Hydra (Nix CI)?
-
-## What is Cachix?