ZSH does not export darwin in NIX_PATH

[AlexeyRaga]

I am trying to configure zsh as my main shell.

So far I have it configured as:

environment.shells = with pkgs; [ bashInteractive zsh ];
programs.zsh.enable = true;
environment.loginShell = "/run/current-system/sw/bin/zsh";

I also had to do chsh to actually switch to zsh.

But nix-darwin doesn't appear to be working in zsh. The reason seems to be that NIX_PATH is not set correctly:

Bash/Fish:

$ echo $NIX_PATH
darwin-config=/Users/araga/.nixpkgs/darwin-configuration.nix:/nix/var/nix/profiles/per-user/root/channels:/Users/araga/.nix-defexpr/channels

ZSH:

% echo $NIX_PATH
nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixpkgs:/nix/var/nix/profiles/per-user/root/channels

Setting nix.nixPath in darwin-configuration.nix doesn't help :(

/etc/zshenv does contain everything that is necessary:

if [ -n "$__ETC_ZSHENV_SOURCED" ]; then return; fi
export __ETC_ZSHENV_SOURCED=1

# Don't execute this file when running in a pure nix-shell.
if test -n "$IN_NIX_SHELL"; then return; fi

if [ -z "$__NIX_DARWIN_SET_ENVIRONMENT_DONE" ]; then
  . /nix/store/hz8ya45g8s21hi9vwvwi2g0krmxl8i5q-set-environment
fi

And when I source /nix/store/hz8ya45g8s21hi9vwvwi2g0krmxl8i5q-set-environment directly and manually it sets NIX_PATH as expected.

This (running in a new shell) suggests that this file has been sourced:

% echo $__ETC_ZSHENV_SOURCED
1
echo $__NIX_DARWIN_SET_ENVIRONMENT_DONE
1

However, NIX_PATH is not set. It looks like it has been reset, or as if __NIX_DARWIN_SET_ENVIRONMENT_DONE has been set before sourcing /etc/zshenv happened for the 1st time...

Am I doing anything wrong?

[AlexeyRaga]

Hmm, is this expected?

$ echo $NIX_PATH
darwin-config=/Users/araga/.nixpkgs/darwin-configuration.nix:/nix/var/nix/profiles/per-user/root/channels:/Users/araga/.nix-defexpr/channels

$ bash

$ echo $NIX_PATH
nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixpkgs:/nix/var/nix/profiles/per-user/root/channels

But at the same time:

$ fish
Welcome to fish, the friendly interactive shell

araga@INTLRagaMac ~/s/a/agora> echo $NIX_PATH
darwin-config=/Users/araga/.nixpkgs/darwin-configuration.nix:/nix/var/nix/profiles/per-user/root/channels:/Users/araga/.nix-defexpr/channels

Something makes it work for fish always, for bash partially and for zsh never. :-/

[LnL7]

The NIX_PATH in zsh is the default of the nix installer, if you override variables in ~/.zshrc or other dotfiles instead of extending the values you will get this behavour.

[gtklocker]

Sorry for necrobumping, but this caught my eye:

I also had to do chsh to actually switch to zsh.

While I had users.users.myuser.shell = pkgs.fish set, I also had to resort to chsh. Is this to be expected?

[Enzime]

Going to close this issue as a lot of the logic surrounding NIX_PATH and environment variables has changed over time, for anyone who runs into this issue, please open a new issue

Manually using chsh shouldn't be required after #1120 but you'll also need to add your user to users.knownUsers