Nixpkgs version

• Unstable (25.05)

Describe the bug

After upgrading nixos-unstable from e3e32b6 to 77172a8 Emacs will try to install some packages that are dependencies to the leaf packages, that I have installed using emacsWithPackages.

For example, I have lsp-mode specified with Nix, and Emacs now tries to download lsp-docker at runtime.

I notice this because I am running Emacs without network access and hence these packages cannot be downloaded.

These packages are still part of the system closure, Emacs just can't seem to find them anymore.

Steps to reproduce

For example use something like this:

    (pkgs.emacs30-nox.pkgs.emacsWithPackages (
      epkgs: with epkgs; [
        lsp-mode # will want lsp-docker among others
        rustic # will want install rust-mode among others
      ]
    ))

$ systemd-run --user --service-type=exec --collect --same-dir --property=PrivateNetwork=true --pty --wait --setenv=COLORTERM emacs

Expected behaviour

Emacs finds all the packages in the system closure

Screenshots

No response

Relevant log output

Additional context

No response

System metadata

❯ nix-shell -p nix-info --run "nix-info -m"

• system: "x86_64-linux"
• host os: Linux 6.14.0-rc6, NixOS, 25.05 (Warbler), 25.05.20250310.77172a8
• multi-user?: yes
• sandbox: yes
• version: nix-env (Lix, like Nix) 2.91.1 System type: x86_64-linux Additional system types: aarch64-linux, i686-linux, riscv64-linux Features: gc, signed-caches System configuration file: /etc/nix/nix.conf User configuration files: /home/tom/.config/nix/nix.conf:/etc/xdg/nix/nix.conf:/home/tom/.nix-profile/etc/xdg/nix/nix.conf:/home/tom/.local/state/nix/profile/etc/xdg/nix/nix.conf:/home/tom/.local/state/nix/profile/etc/xdg/nix/nix.conf:/etc/profiles/per-user/tom/etc/xdg/nix/nix.conf:/nix/var/nix/profiles/default/etc/xdg/nix/nix.conf:/run/current-system/sw/etc/xdg/nix/nix.conf:/nix/store/33mpkfx3c3071a858hnd0accknhhj346-gnome-settings-daemon-47.2/etc/xdg/nix/nix.conf Store directory: /nix/store State directory: /nix/var/nix Data directory: /nix/store/zm68nasdmai8qzgzlb55m10mrl93dzqd-lix-2.91.1/share
• nixpkgs: /etc/nix/inputs/nixpkgs

Notify maintainers

@AndersonTorres
@adisbladis
@jwiegley
@lovek323
@matthewbauer

Note for maintainers: Please tag this issue in your pull request description. (i.e. Resolves #ISSUE.)

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• I assert that this is a bug and not a support request.
• I assert that this is not a duplicate of an existing issue.
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