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NixOS Networking

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Declaratively manage your switching, routing, wireless, tunneling and more. | Don't rely on `networking.*` use systemd-networkd and NetworkManager instead. | Set `SYSTEMD_LOG_LEVEL=debug` to debug networking issues with networkd | No bad nft puns, please. | Room recommendations: #sysops:nixos.org248 Servers

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8 Oct 2025
@elvishjerricco:matrix.orgElvishJerricco x10an14: { imports = ...; } // lib.mkMerge [ ... ] seems busted 07:55:46
@elvishjerricco:matrix.orgElvishJerricco should just be { imports = ...; config = lib.mkMerge [ ... ]; } 07:56:16
@x10an14:matrix.orgx10an14
In reply to @elvishjerricco:matrix.org
x10an14: { imports = ...; } // lib.mkMerge [ ... ] seems busted
Nix evaluates it without issue, but sure, I think that's a reasonable suggestion, thanks!
08:01:10
@elvishjerricco:matrix.orgElvishJerricco frankly I'm not sure what it evaluates too, once through the module system 08:01:31
@elvishjerricco:matrix.orgElvishJerriccoit might just be dropping stuff, I dunno08:01:37
@elvishjerricco:matrix.orgElvishJerricco actually, when I try that I get: error: Expected a module, but found a value of type "merge".) 08:03:27
@elvishjerricco:matrix.orgElvishJerricco * actually, when I try that I get: error: Expected a module, but found a value of type "merge". 08:03:30
@x10an14:matrix.orgx10an14
In reply to @k900:0upti.me
Just use resolved

Hmm, that requires more research... Got any hints/directions to suggest?

This diff spawned out of using "stock" nixos 25.11 + facter on a hetzner box, and wanting to add a custom DNS as top priority, with DHCP dns entries maintained after the custom one

08:04:44
@k900:0upti.meK900Why are you using networkmanager on a hetzner box08:05:00
@k900:0upti.meK900In the first place08:05:06
@x10an14:matrix.orgx10an14
In reply to @elvishjerricco:matrix.org
actually, when I try that I get: error: Expected a module, but found a value of type "merge".
Maybe flake-parts modules does some magic for me?
08:05:18
@elvishjerricco:matrix.orgElvishJerriccothat would be quite shocking08:05:32
@elvishjerricco:matrix.orgElvishJerriccoit should not be fundamentally changing how the module system works08:05:42
@k900:0upti.meK900Oh wait08:06:03
@elvishjerricco:matrix.orgElvishJerriccoI'm more worried that you're not actually importing this module and that's why it isn't throwing an error or doing what you expected it to do08:06:03
@k900:0upti.meK900You're NOT using networkmanager08:06:06
@k900:0upti.meK900You're using scripted networking08:06:12
@k900:0upti.meK900And trying to apply networkmanager options to it08:06:16
@k900:0upti.meK900I assume it's this? ┃ │ ┌─ ⏸ unit-dbus-broker.service08:06:32
@k900:0upti.meK900* I assume it's this? https://github.com/slackhq/nebula08:06:38
@x10an14:matrix.orgx10an14
In reply to @k900:0upti.me
Why are you using networkmanager on a hetzner box
Best suggestion I found after 2h of web search and 4+ years of nixos usage searching for "add dns server to nixos without removing DHCP"
08:07:06
@k900:0upti.meK900 services.resolved.enable = true is what you want I'm pretty sure 08:07:22
@k900:0upti.meK900And then hopefully it does the right thing08:07:27
@k900:0upti.meK900And if it doesn't, it's fundamentally broken08:07:43
@x10an14:matrix.orgx10an14
In reply to @k900:0upti.me
I assume it's this? https://github.com/slackhq/nebula
It's a DNS on that VPN I want that box to use as primary DNS, yes
08:08:09
@elvishjerricco:matrix.orgElvishJerricco K900 the networking.useDHCP = true; line in that diff is a - line. I think they were trying to switch? 08:08:16
@k900:0upti.meK900So it's your own custom nameserver?08:08:20
@k900:0upti.meK900Not something Nebula provides for you?08:08:25
@k900:0upti.meK900 Then just put it in networking.nameservers and it should work 08:08:43
@elvishjerricco:matrix.orgElvishJerricco(still none of this explains why you didn't get a module system eval error so I'm still not convinced this module is actually being imported)08:08:56

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