What if I found a bug?

I am a noob.
And I found a bug (see below)?
Is this an appropiate place for bugs/discussions about wether it is a bug?

$ sudo nixos-rebuild --upgrade switch

building '/nix/store/jawjwq71krnaj7j95ajpkrgvnknwd3l9-udev-rules.drv'...
cannot build derivation '/nix/store/jm8f8hk3lh2cf8jkg3ax9gph5ciygnvj-udev-rules.drv': 1 dependencies couldn't be built```

Are you using the stable release?
Is that the complete log/result of running that command? If not post them all

azazel75

    October 27

Are you using the stable release?

I’m trying to switch from unstable to 19.09.

Is that the complete log/result of running that command?

No, there was a lot of normal-looking stuff too.

But I can no longer reproduce (since it fixed itself). My theory is that something was wrong with the .nixos-channels file.

Thanks!

Can you elaborate? I stumbled upon a similar issue (the same?) when upgrading from 19.03 to 19.09.

not trying to be coy, but I don’t really understand it.
I had (and have) two .nixos-channels files; in ~ and in ~root (i.e./root). when it failed, they were different. when I made them identical (by softlinking, it worked.
the one in ~ is so I can git control the nixos setup. maybe it does something bad?

Never heard of .nixos-channels before. Is it analogue to
nix-channel(1)? Is it documented somewhere? I cannot find any mention
of it in the NixOS manual.

apologies. it’s a file, and it’s called .nix-channels.
I’m on a phone…

No worries; my questions weren’t exclusively directed at you, but to whomever might have an answer.