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Improve explanation of NIX_PATH prefix syntax

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The previous wording seemed to imply that the "channel:" syntax would resolve to
a github archive URL, which is not the case.
This commit is contained in:
Keshav Kini 2021-06-03 17:59:39 -07:00
parent bb06640971
commit f35f9af787
1 changed files with 23 additions and 19 deletions
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18
doc/manual/src/command-ref/env-common.md
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@ -28,17 +28,21 @@ Most Nix commands interpret the following environment variables:
consist of a single top-level directory. For example, setting consist of a single top-level directory. For example, setting
`NIX_PATH` to `NIX_PATH` to
nixpkgs=https://github.com/NixOS/nixpkgs/archive/nixos-15.09.tar.gz nixpkgs=https://github.com/NixOS/nixpkgs/archive/master.tar.gz
tells Nix to download the latest revision in the Nixpkgs/NixOS 15.09 tells Nix to download and use the current contents of the
channel. `master` branch in the `nixpkgs` repository.
A following shorthand can be used to refer to the official channels: The URLs of the tarballs from the official nixos.org channels (see
[the manual for `nix-channel`](nix-channel.md)) can be abbreviated
as `channel:<channel-name>`. For instance, the following two
values of `NIX_PATH` are equivalent:
nixpkgs=channel:nixos-15.09 nixpkgs=channel:nixos-21.05
nixpkgs=https://nixos.org/channels/nixos-21.05/nixexprs.tar.xz
The search path can be extended using the `-I` option, which takes The Nix search path can also be extended using the `-I` option to
precedence over `NIX_PATH`. many Nix commands, which takes precedence over `NIX_PATH`.
- `NIX_IGNORE_SYMLINK_STORE`\ - `NIX_IGNORE_SYMLINK_STORE`\
Normally, the Nix store directory (typically `/nix/store`) is not Normally, the Nix store directory (typically `/nix/store`) is not