fish: Unknown command: fenv

[toonn]

Issue description

It seems like the fish module has regressed. After updating my channels (nixpkgs-unstable and home-manager master) a home-manager switch (via the nix-darwin module) resulted in the following errors during activation:

Activating home-manager configuration for toonn
fish: Unknown command: fenv
/etc/fish/nixos-env-preinit.fish (line 7): 
    fenv source /nix/store/xda74vl5nkcdhmhd6hgwffa949yxrh7c-set-environment
    ^
from sourcing file /etc/fish/nixos-env-preinit.fish
	called on line 16 of file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/share/fish/__fish_build_paths.fish
from sourcing file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/share/fish/__fish_build_paths.fish
	called on line 66 of file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/share/fish/config.fish
from sourcing file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/share/fish/config.fish
	called during startup
fish: Unknown command: fenv
/etc/fish/config.fish (line 6): 
  fenv source /etc/fish/foreign-env/shellInit > /dev/null
  ^
from sourcing file /etc/fish/config.fish
	called on line 39 of file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/etc/fish/config.fish
from sourcing file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/etc/fish/config.fish
	called during startup
fish: Unknown command: fenv
/etc/fish/config.fish (line 20): 
  fenv source /etc/fish/foreign-env/loginShellInit > /dev/null
  ^
from sourcing file /etc/fish/config.fish
	called on line 39 of file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/etc/fish/config.fish
from sourcing file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/etc/fish/config.fish
	called during startup
Starting home manager activation

Every new shell I start repeats these because they're part of the rc file equivalent for fish:

/etc/fish/nixos-env-preinit.fish (line 7): 
    fenv source /nix/store/xda74vl5nkcdhmhd6hgwffa949yxrh7c-set-environment
    ^
from sourcing file /etc/fish/nixos-env-preinit.fish
	called on line 16 of file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/share/fish/__fish_build_paths.fish
from sourcing file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/share/fish/__fish_build_paths.fish
	called on line 66 of file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/share/fish/config.fish
from sourcing file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/share/fish/config.fish
	called during startup
r/etc/fish/config.fish (line 6): 
  fenv source /etc/fish/foreign-env/shellInit > /dev/null
  ^
from sourcing file /etc/fish/config.fish
	called on line 39 of file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/etc/fish/config.fish
from sourcing file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/etc/fish/config.fish
	called during startup
/etc/fish/config.fish (line 20): 
  fenv source /etc/fish/foreign-env/loginShellInit > /dev/null
  ^
from sourcing file /etc/fish/config.fish
	called on line 39 of file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/etc/fish/config.fish
from sourcing file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/etc/fish/config.fish
	called during startup
/etc/fish/config.fish (line 37): 
  fenv source /etc/fish/foreign-env/interactiveShellInit > /dev/null
  ^
from sourcing file /etc/fish/config.fish
	called on line 39 of file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/etc/fish/config.fish
from sourcing file /nix/store/4bi8kzwknl52xxmr89rjig9kh8wzfwpq-fish-3.1.2/etc/fish/config.fish
	called during startup
~/.config/fish/config.fish (line 8): 
  fenv source /Users/toonn/.nix-profile/etc/profile.d/hm-session-vars.sh > /dev/null
  ^
from sourcing file ~/.config/fish/config.fish
	called during startup
m ⏎                                                                             Welcome to fish, the friendly interactive shell
toonn@terra ~>

Meta

Maintainer CC

Technical details

 - system: `"x86_64-darwin"`
 - host os: `Darwin 17.7.0, macOS 10.13.6`
 - multi-user?: `no`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.3.10`
 - channels(toonn): `"darwin, home-manager, nixpkgs-21.03pre261714.44c443a7a60"`
 - nixpkgs: `/Users/toonn/.nix-defexpr/channels/nixpkgs`

[toonn]

The store path containing fenv is missing for me "/nix/store/78fgsh2lfp0ck2kfpm9xw0z7z4mydxzb-fishplugin-foreign-env-git-20200209/share/fish-foreign-env".