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Merge pull request #6865 from zuzuleinen/manual-nix-path-empty

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document what happens when NIX_PATH is empty
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Valentin Gagarin 2023-03-23 00:10:17 +01:00 committed by GitHub
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doc/manual/src/command-ref/env-common.md
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@ -13,6 +13,17 @@ Most Nix commands interpret the following environment variables:
e.g. `/home/eelco/Dev:/etc/nixos`. It can be extended using the
[`-I` option](./opt-common.md#opt-I).
If `NIX_PATH` is not set at all, Nix will fall back to the following list in [impure](./conf-file.md#conf-pure-eval) and [unrestricted](./conf-file.md#conf-restrict-eval) evaluation mode:
1. `$HOME/.nix-defexpr/channels`
2. `nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixpkgs`
3. `/nix/var/nix/profiles/per-user/root/channels`
If `NIX_PATH` is set to an empty string, resolving search paths will always fail.
For example, attempting to use `<nixpkgs>` will produce:
error: file 'nixpkgs' was not found in the Nix search path
- [`NIX_IGNORE_SYMLINK_STORE`]{#env-NIX_IGNORE_SYMLINK_STORE}\
Normally, the Nix store directory (typically `/nix/store`) is not
allowed to contain any symlink components. This is to prevent