Networkmanager profile "never-default" = "yes" ignored?

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1

I have this in my /etc/nixos/configuration.nix:

networking.networkmanager.ensureProfiles.profile.<name>.ipv4."never-default" = "yes"

But it seems it’s silently ignored. Looking at the profile in nmcli, even after deleting and recreating it with nixos-rebuild switch always shows:

ipv4.never-default:                     no

Did I do something wrong here or is that a bug in NixOS?

For now as a workaround I’ve switched to configure the network manager profiles in which I require the “never-default” directive via:

environment.etc."NetworkManager/system-connections/<name>.nmconnection"
2

fixed it. it was a vibe coding messup. correct property value needs to be:

"never-default" = "true";

not “yes”.