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NixOS RISC-V

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NixOS on RISC-V https://wiki.nixos.org/wiki/RISC-V https://pad.lassul.us/NixOS-riscv64-linux https://github.com/orgs/NixOS/teams/risc-v71 Servers

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27 Mar 2025
@alex:tunstall.xyzAlex
In reply to @implr:hackerspace.pl
I'll try your flake as-is
See the instructions in README. As-is, it requires some x86 cross-compilation for GHC (or you can edit out the Haskell dependencies).
23:14:55
@implr:hackerspace.plimplr I just want to see if the bootstrap builds, so I'm doing .#nixosConfigurations.nixos.pkgs.bash 23:15:37
@implr:hackerspace.plimplrif that passes it's already further than I got23:15:45
@alex:tunstall.xyzAlex Well, if that evaluates and doesn't complain about needing an x86_64 machine, it should be OK (it could still require GHC because of ShellCheck being used in writeShellScript). 23:16:59
@implr:hackerspace.plimplr Oh, I am on a amd64 machine with extra-platforms = riscv64-linux right now, so that should just work, but that might be the difference which makes bison work for you and not me 23:20:01
@implr:hackerspace.plimplrRedacted or Malformed Event23:20:04
28 Mar 2025
@implr:hackerspace.plimplrthe flake does not build either, so it must be somethign with qemu-user that breaks the test12:35:02
@scottytheengineer:matrix.orgscottytheengineer joined the room.18:16:21
@SeTSeR:matrix.orgWhite Whale Hello! I’m trying to build `nicotine-plus` on my visionfive 2, and I stumbled upon failing test of `watchdog`. I tried overriding this with following overlay:
```nix
python3Packages = super.python3Packages.overrideScope (self: super: {
    sphinx = overrideSphinx super.sphinx;
    pytest-timeout = disablePythonTests super.pytest-timeout;
    hypothesis = disablePythonTests super.hypothesis;
    eventlet = disableTests super.eventlet;
    watchdog = super.watchdog.overridePythonAttrs (old: {
      disabledTests = [ "test_select_fd" ];
    });
    werkzeug = super.werkzeug.overridePythonAttrs (old: {
      nativeCheckInputs = old.nativeCheckInputs ++ [ self.watchdog ];
    });
  });
```
but problematic version is still built and thus failing build. `nix why-depends` shows dependency on watchdog from werkzeug. How should I resolve this problem?

I came here with similar question some time ago, I tried suggestions from thread and did some investigation with GPT, but I was unable to compile `watchdog`. Should I resort to modifying nixpkgs?
20:41:18
@alex:tunstall.xyzAlex Sometimes problematic packages can be dropped from the build closure altogether. Have you looked at why it's needed with nix why-depends --derivation --all? 21:57:25
29 Mar 2025
@lab.8916100448256:matrix.org12b Hello.
I'm a little bit of a newvie on NixOS. I've been using it on my x86_64 laptop for a couple of months. And I did some install on a few ARM boards.
I'm now trying to install NixOS on RISC-V.
I first tried on a Vision Five 2. I managed to have NixOS running on it. But it was kinf of a pain. And I faced the slow build times and the compilaiton errors mentioned In this channel when doing nixos-rebuild on it.
I bough myself an OrangePi RV2 and it just arrived yesterday.
I installed the official Ubuntu image on it, on an SSD. So far I'm quite pleased. The partiioning scheme they use has only one partition on the SSD. Quite different from the many partitions nonsense I had to creaté to install NixOS on an SSD for the Vision Five 2. Also the performances of the board are better.
But now, I'm clueless at how I could install NixOS on it.
06:59:21
@alex:tunstall.xyzAlex"Official" as in an image distributed by Ubuntu maintainers and not the manufacturer?07:01:32
@lab.8916100448256:matrix.org12bno sorry I meant distributed by the manufacturer21:35:06
@alex:tunstall.xyzAlex

Try to find the sources for the Linux kernel and whatever bootloader they're using (they probably have custom patches).
You can customise NixOS to use those sources.
You may also need to search for documentation on how to setup the bootloader and replicate it with a bit of Nix.

Other than that, it's no different from doing a regular NixOS install.
Of course, you still can't expect to have riscv64 from the official NixOS binary cache, so expect the system build to take a while.
Some things can be disabled to save time, but most of the things that are enabled by default are somewhat "essential".

21:39:11
@lab.8916100448256:matrix.org12bthe kernel source they are using is in https://github.com/orangepi-xunlong/orangepi-build for the bootloader I don't know.21:56:26
30 Mar 2025
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31 Mar 2025
@roedimqf:ruhr-uni-bochum.deMichael
In reply to @lab.8916100448256:matrix.org
the kernel source they are using is in https://github.com/orangepi-xunlong/orangepi-build
for the bootloader I don't know.
my board should arive this week, so I've been poking around a bit. The relevant repositiories should be
https://github.com/orangepi-xunlong/linux-orangepi/tree/orange-pi-6.6-ky
https://github.com/orangepi-xunlong/u-boot-orangepi/tree/v2022.10-ky
07:05:49
@roedimqf:ruhr-uni-bochum.deMichael
In reply to @lab.8916100448256:matrix.org
the kernel source they are using is in https://github.com/orangepi-xunlong/orangepi-build
for the bootloader I don't know.
* my board should arrive this week, so I've been poking around a bit. The relevant repositiories should be
https://github.com/orangepi-xunlong/linux-orangepi/tree/orange-pi-6.6-ky
https://github.com/orangepi-xunlong/u-boot-orangepi/tree/v2022.10-ky
07:10:07
@lab.8916100448256:matrix.org12b Ah, thnaks. I saw a relevant commit in their default branch next and I did not look further 07:10:29
@lab.8916100448256:matrix.org12b * Ah, thanks. I saw a relevant commit in their default branch next and I did not look further 07:10:37
@lab.8916100448256:matrix.org12bRedacted or Malformed Event07:12:31
@roedimqf:ruhr-uni-bochum.deMichaelhttps://github.com/orangepi-xunlong/orangepi-build/blob/36a2f27f9b2d064331e4e22ccd384e0d269dbd31/external/config/sources/riscv64.conf#L30 here you can find the links, took me some time to dig this up :D07:14:33
@lab.8916100448256:matrix.org12bsorry I did not see you posted the bootoader link already07:14:37
@roedimqf:ruhr-uni-bochum.deMichaelhttps://github.com/orangepi-xunlong/orangepi-build/blob/36a2f27f9b2d064331e4e22ccd384e0d269dbd31/external/config/sources/families/ky.conf might also be interesting07:21:09
@lab.8916100448256:matrix.org12bI meant in the repo link I posted07:21:49
@lab.8916100448256:matrix.org12bSorry a little bit early for me. I'm not fully awake.07:22:40
@roedimqf:ruhr-uni-bochum.deMichael no worries 07:22:48
@lab.8916100448256:matrix.org12bAnd I'm working on something else right now. But I will come back NixOS on the RV later this week. 07:24:37
@lab.8916100448256:matrix.org12b* And I'm working on something else right now. But I will come back NixOS on the RV2 later this week. 07:24:45

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