Creating a flake for `flow`

[aidanaden]

I'm trying to create a flake for https://github.com/neurocyte/flow to allow nix users to test out the app with the command: nix run github:neurocyte/flow

I've managed to get a working flake on m1 macbook air, but nix run . fails on x86-64 nixos. The flake is as below:

{
  description = "flow project flake";

  inputs = {
    zig2nix.url = "github:Cloudef/zig2nix";
  };

  outputs =
    { zig2nix, ... }:
    let
      flake-utils = zig2nix.inputs.flake-utils;
    in
    (flake-utils.lib.eachDefaultSystem (
      system:
      let
        # Zig flake helper
        # Check the flake.nix in zig2nix project for more options:
        # <https://github.com/Cloudef/zig2nix/blob/master/flake.nix>
        env = zig2nix.outputs.zig-env.${system} {
          zig = zig2nix.outputs.packages.${system}.zig."0.13.0".bin;
        };
        system-triple = env.lib.zigTripleFromString system;
      in
      with builtins;
      with env.lib;
      with env.pkgs.lib;
      rec {
        # nix build .#target.{zig-target}
        # e.g. nix build .#target.x86_64-linux-gnu
        packages.target = genAttrs allTargetTriples (
          target:
          env.packageForTarget target (
            {
              src = cleanSource ./.;

              nativeBuildInputs = with env.pkgs; [ ];
              buildInputs = with env.pkgsForTarget target; [ ];

              # Smaller binaries and avoids shipping glibc.
              zigPreferMusl = true;

              # This disables LD_LIBRARY_PATH mangling, binary patching etc...
              # The package won't be usable inside nix.
              zigDisableWrap = true;

              zigBuildFlags = [ "-Dcpu=baseline" ];
            }
            // optionalAttrs (!pathExists ./build.zig.zon) {
              pname = "flow";
              version = "0.1.0";
            }
          )
        );

        # nix build .
        packages.default = packages.target.${system-triple}.override {
          # Prefer nix friendly settings.
          zigPreferMusl = false;
          zigDisableWrap = false;
        };

        # nix run .
        apps.default =
          let
            pkg = packages.target.${system-triple};
          in
          {
            type = "app";
            program = "${pkg}/bin/flow";
          };

        # nix run .#build
        apps.build = env.app [ ] "zig build \"$@\"";
      }
    ));
}

The error i receive when running nix run . on my x86-64 nixos is:

error: builder for '/nix/store/2cjssqfd8580m4lj1lv975m41sivdx6c-zig-linux-x86_64-0.14.0-dev.1646+b19d0fb0f.tar.xz.drv' failed with exit code 1;
       last 7 log lines:
       >
       > trying https://ziglang.org/builds/zig-linux-x86_64-0.14.0-dev.1646+b19d0fb0f.tar.xz
       >   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
       >                                  Dload  Upload   Total   Spent    Left  Speed
       >   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
       > curl: (22) The requested URL returned error: 404
       > error: cannot download zig-linux-x86_64-0.14.0-dev.1646+b19d0fb0f.tar.xz from any mirror
       For full logs, run 'nix log /nix/store/2cjssqfd8580m4lj1lv975m41sivdx6c-zig-linux-x86_64-0.14.0-dev.1646+b19d0fb0f.tar.xz.drv'.
error: 1 dependencies of derivation '/nix/store/gylj2kj09p2wn7jd5dhvm4vjvvhwhmvb-zig-0.14.0-dev.1646+b19d0fb0f.drv' failed to build
error: 1 dependencies of derivation '/nix/store/m4f6hrhvsnk2rgf970m72yvqyg0gbbgs-zig-hook.drv' failed to build
error: 1 dependencies of derivation '/nix/store/306xcrqxzhmngib9m1a90kb7vs04yqm0-zon2json.drv' failed to build
error:
       … while calling the 'getAttr' builtin

         at /builtin/derivation.nix:19:19: (source not available)

       … while calling the 'derivationStrict' builtin

         at /builtin/derivation.nix:9:12: (source not available)

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: 1 dependencies of derivation '/nix/store/vf68ggmg0a9rl3lbnv0pvn0xik0vv5jx-fromZON.drv' failed to build

is there a way to enforce the use of 0.13.0 to circumvent having to download/build zig-0.14.0?

[Cloudef]

Ah, this might be the fact zig2nix uses the master to build some internal tools. Good catch. I'll switch the internal tools to use default zig to avoid link rot.

[aidanaden]

Ah, this might be the fact zig2nix uses the master to build some internal tools. Good catch. I'll switch the internal tools to use default zig to avoid link rot.

thank u so much !! i'll be honest i'm pretty new to nix and barely know what im doing LOL

[Cloudef]

Should be fixed in 23d877ada261e3a6da9520c22fcd08859950b786