# How can I enable internal config options?

**URL:** https://discourse.nixos.org/t/how-can-i-enable-internal-config-options/13915
**Category:** Help
**Created:** [July 4, 2021, 3:37am UTC](https://discourse.nixos.org/t/how-can-i-enable-internal-config-options/13915 "2021-07-04T03:37:43Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![mikepurvis](https://discourse.nixos.org/user_avatar/discourse.nixos.org/mikepurvis/32/7706_2.png) [@mikepurvis](https://discourse.nixos.org/u/mikepurvis)
#### Post date: [July 4, 2021, 3:37am UTC](https://discourse.nixos.org/t/how-can-i-enable-internal-config-options/13915/1 "2021-07-04T03:37:43Z")

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Specifically this one, permitting envvars to be set on the nix-daemon:

> <https://github.com/NixOS/nixpkgs/blob/21b696caf392ad6fa513caf3327d0aa0430ffb72/nixos/modules/services/misc/nix-daemon.nix#L305-L311>

Actually setting it appears to do nothing, though, I guess because of the `internal = true`? I looked briefly in the manual and didn’t see an indication of how to enable these.

Alternatively, if there’s a way to set arbitrary environment variables on the nix-daemon (perhaps from a file), that would be great— the generated systemd `overrides.conf` file is a link to a store path, so I shouldn’t directly edit it.