nixpkgs is essentially a monolithic
git repo containing a directory tree of nix expressions.
The unstable channel
contains the latest set of packages. The citizens of nix are busy everyday
modifying and extending the expressions in the
nixpkgs so that you can
check out and compile everything you want using nix
from a patched version of
libcairo, or the entirety of
When you are subscribed to the channel updates begin when changes are pushed to master/release XX.XX branches.
You can add new channels via:
nix-channel --add https://some.channel/url my-alias
Nixpkgs/NixOS channels correspond with
nixpkgs repository branches (or vice versa).
origin/nixos-17.03 contains the built/tested version of the derivations for 17.03.
You can always tell which version of
nixpkgs you are linking to:
nix-instantiate --eval --expr 'builtins.readFile <nixpkgs/.version>'
To join the fun you can clone the nixpkgs from github and start modifying expressions to your
hearts content. You can then load an environment against your version of
is a great way to start expanding and debugging the package sets and joining the community.
nix-shell -I nixpkgs=~/my-local-clone-of-nixpkgs