• AVincentInSpace@pawb.socialEnglish
      5·
      6 months ago

      I recently tried switching from Arch to NixOS and the experience I had can best be described as apalling. I have not had a new user experience this bad since my first dip into Ubuntu dependency hell back in 2016. I’d like to preface this by saying I’ve been a Linux user in one form or another for almost half my life at this point, and in that time this may well be the most I’ve struggled to get things to work.

      Apparently they have this thing called home-manager which looks pretty cool. I’d like to give that a shot. Apparently I have to enable a new Nix channel before I can install it. I’m guessing that’s the equivalent of a PPA? Well, alright. nix-channel --add ..., nix-channel --update (oh, so it waits until now to tell me I typo’d the URL. Alright), and now to run the installation command and… couldn’t find home-manager? Huh?? I just installed it. I google the error message and apparently you have to reboot after adding a new nix-channel and doing nix-channel --update before it will actually take effect, and the home-manager guide didn’t tell me that. Ah well, at least it works now.

      I didn’t want to wait for KDE and its 6 morbillion dependencies to download, so I opted for Weston. It wasn’t a thing in configuration.nix (programs.weston.enable=true; threw an error and there was no page for it on the NixOS wiki), but it was available in nix-env (side note: why does nix-env -i take upwards of 30 seconds just to locate a package?), so I installed it, tried to run it, and promptly got an inscrutable “Permission denied” error with one Google result that had gone unresolved. Oh well, that’s alright, I guess that’s not supported just yet – I’ll install Sway instead. Great, now I have a GUI and all I need is a browser. nix-env -i firefox gave me the firefox-beta binary which displayed the crash reporter before even opening a browser window. Okay, note to self: always use configuration.nix. One programs.firefox.enable=true; and one nixos-rebuild switch later, I’m off to the races. Browser is up and running. Success! Now I’d like to install a Rust development environment so I can get back to work. According to NixOS wiki, I can copy paste this incantation into a shell.nix file and have rustup in there. Cool. After resolving a few minor hangups regarding compiler version, manually telling rustc where the linker is, and telling nix-shell that I also need cmake (which was thankfully pretty easy), I’m met with a “missing pkg-config file for openssl” error that I have absolutely no idea how to begin to resolve.

      I’m trying to stick with it, I really am – I love the idea that I can just copy my entire configuration to a brand new install by copying one file and the contents of my home directory and have it be effectively the same machine – but I’m really struggling here. Surely people wouldn’t rave about NixOS as much as they do if it was really this bad? What am I doing wrong?

      Also unrelated but am I correct in assuming that I cannot install KDE without also installing the X server?

      • krzyz
        2·
        6 months ago

        I made a similar switch half a year ago and thankfully for me it was relatively painless. Some stuff got significantly harder to set up (e.g. getting a nice rust development environment, getting ROCm to work with some torch-based project), but once all that is done I have complete or near-complete setup instructions on how to do it again, so I am hoping the trade-off here will be worth it in the future (or I will drop nixos and move to something else if I get bored, time will tell).

        For the beginners, I recommend to go with the flakes setup right from the start, here is a nice guide that you can use as a reference: https://nixos-and-flakes.thiscute.world. I followed it through for the initial setup and I don’t remember having to think about channels, at least initially: I picked the most recent stable one right at the start and only updated it to another - the unstable one - later on when I wanted to get some fresh kernel version. The upgrade was pretty painless, as the channel is just the root input of the flake: change that one line, nixos-rebuild switch and it’s done. With flakes I occasionally run nix flake update (+ rebuild) to get newer versions of packages (as the flake will be locked to the state of the channel at the time you install/update). If anything (well, most) of the things go wrong, just go back to the previous build while you figure out what’s causing issues (much better than the Arch experience of something going wrong after the update - better read Arch news regularly 🙃).

        Besides updating my configuration to add/remove packages and doing the same for development environments (btw, for getting compile time dependencies into nix-shell, you need to add them to buildInputs of the shell: https://nixos.wiki/wiki/FAQ/I_installed_a_library_but_my_compiler_is_not_finding_it._Why%3F ), I only ever use nix profile install nixpkgs#<package> if I want to just run some app without adding it permanently. After these 6 months of use, I have found out I am getting much less software/package cruft building up in my system. If I stop using something (especially a big think like a DE), I can just remove it from the configuration, rebuild and that’s it. With Arch, I probably even forgot about half of the things I installed there over the years.