nix-eshell does not work

[happyboy2k]

Hello, I have a problem with the nix-eshell command. I cannot use the programs I defined in my .nix file.
It somehow does not update the environment variables.

 echo $PATH
/run/wrappers/bin:/home/user/.nix-profile/bin:/etc/profiles/per-user/user/bin:/nix/var/nix/profiles/default/bin:/run/current-system/sw/bin

in  nix-eshell:
echo $PATH
/run/wrappers/bin:/home/user/.nix-profile/bin:/etc/profiles/per-user/user/bin:/nix/var/nix/profiles/default/bin:/run/current-system/sw/bin

in nix-shell:
 echo $PATH
/run/wrappers/bin:/usr/bin:/usr/sbin:/nix/store/kbcrs84s1x8yd5bp1nq6q6ihda8nd2lp-bash-interactive-5.2-p15/bin:/nix/store/ywwjpdyhar4f3vcqf4qk77vrbr3vj5wl-patchelf-0.15.0/bin:/nix/store/ahkfdxq8mcpsb5kvdvgqr1wv8zjngbh4-coreutils-9.1/bin:/nix/store/4qrbfa42xyicny7vlgbbqxz07kcsjbx2-findutils-4.9.0/bin:/nix/store/6bcqajyagcc4s3azx0zqnb3rqxd7gdnv-diffutils-3.9/bin:/nix/store/gy82r5cf12hgkmhzifsyx3fp6cnf6j2l-gnused-4.9/bin:/nix/store/zrls4w5lxynqakh1jlrp03kg4bxzp9yi-gnugrep-3.7/bin:/nix/store/s3yl3l8na93v53k2cfsyz0jrb50bnk8n-gawk-5.2.1/bin:/nix/store/czy796d2241296bdy45w87cmaiig50zr-gnutar-1.34/bin:/nix/store/hdbb5ayyrz1b5hicbsb4am8vin0xxxg6-gzip-1.12/bin:/nix/store/hd573q7097cxj5q29pnc3z0rvakz7ga3-bzip2-1.0.8-bin/bin:/nix/store/nnis9ph3wj866bbs0lalbf22i5bq8yry-gnumake-4.4.1/bin:/nix/store/rhvbjmcfnkg8i2dxpzr114cp1ws7f667-bash-5.2-p15/bin:/nix/store/x4ckkjsxfl4ihl82v0bzsyxs4ay2d5b5-patch-2.7.6/bin:/nix/store/8xjzmhw6hgqmynb5f1v7aw2lvafij405-xz-5.4.3-bin/bin:/nix/store/lcjsmsxqwd4vkq2wj5mmbyjzny3i6k49-file-5.44/bin:/run/wrappers/bin:/home/user/.nix-profile/bin:/etc/profiles/per-user/user/bin:/nix/var/nix/profiles/default/bin:/run/current-system/sw/bin

in nixos configuration:
programs.emacs.extraPackages = epkgs: [epkgs.nix-mode];

greetings

[RomeoV]

I have a related problem.

My shell.nix file looks like this:

{ pkgs ? import <nixpkgs> {} }:

pkgs.mkShell {
  buildInputs = [
    pkgs.python311  # You can change this to the desired Python version
    pkgs.poetry
  ];
}

However, running nix-shell or nix-eshell pointed at this file, and just pressing Ret when asked for an attribute, yields

nix-instantiate: Error: nix-instantiate shell.nix failed to produce any output

and the paths are not loaded.

Assigning the shell to an attribute and loading that also doesn't work.

I am on emacs 29.1 and on the latest commit of nix-mode.

EDIT: Okay I found out it is because I am accessing the file through TRAMP and essentially execute the local call-process nix-instantiate) so it doesn't find the file. I'll see if I can fix that.

[RomeoV]

I made some progress by replacing several calls to call-process by process-file, which is essentially a drop-in replacement that also respects remote processes, and further running (add-to-list 'tramp-remote-path 'tramp-own-remote-path). However, it's still not fully working...