22:19 <tnks> I upgraded from High Sierra to Mojave, and it seemed to break my Nix installation. So I followed the steps for uninstallation and reinstalled everything (from Terminal.app because there's a known permissions hiccup), and now I get this error when I do anything that pulls in new packages like `nix run nixpkgs.hello -c hello`: error

22:20 <tnks> Sorry, the error is `error: unexpected end-of-file`

22:20 <tnks> This almost feels like the kind of thing you get when dealing with Shell script compatibility problems, but I'm just guessing.

22:21 <tnks> Because I've always done so in the past, I installed Nix as multi-user... I suppose I can try not doing that.

22:21 <LnL> sounds like https://github.com/NixOS/nix/issues/2523

22:21 <{^_^}> nix#2523 (by periklis, 10 weeks ago, open): darwin: nix-daemon crashes due to OBJC_DISABLE_INITIALIZE_FORK_SAFETY

22:22 <tnks> LnL: I just saw that, but wasn't sure.

22:26 <tnks> LnL: actually... I think that's exactly my problem. But from the comments in the ticket, I don't know what the workaround is.

22:26 <tnks> it seems like it's not a problem with nix-daemon as much as curl.

22:29 <LnL> yeah true, but it only occurs when the nix-daemon uses libcurl after it forks

22:30 <LnL> so a single-user install won't run into it

22:30 <tnks> LnL: what makes you certain that other programs won't have this same usage problem with libcurl?

22:34 <LnL> they could, but forking like this isn't very common I think

22:35 <tnks> LnL: makes me uneasy, but I don't know I have any other path forward.

22:36 <LnL> it would be great if there was some other way to trigger it, I tried to make an example program to reproduce it but have not had any success with it yet

22:37 <LnL> there are a few things you can do to work around the issue in with nix specifically

22:38 <LnL> 1. replace the org.nixos.nix-daemon.plist and add the variable to disable the new error

22:39 <LnL> 2. install nix-2.1.3 instead, which doesn't suffer from this problem yet

22:39 <LnL> 3. don't do a daemon install

22:50 <tnks> LnL: okay, I opted for 1.

22:50 <tnks> My hopes are I can just hobble along until it's fixed properly.

22:52 <LnL> I was hoping that I would have figured out what's going on before a new version was released, but now that 2.2 is out I might make a pr to add that as a workaround

22:53 <tnks> Yeah, I agree.

23:37 <tnks> LnL the default installation of Nix sets up the root user with a nixpkgs-unstable channel.

23:38 <tnks> but it seems like for Darwin maybe nixpkgs-18.09-darwin is better to track?