!SgYlXivkogarTVcnZO:nixos.org

Nix Flakes

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16 Oct 2025
@rav:vergara.techRene I did some research and I found that the base64ct team made this edition2024 change and broke half the Rust crates out there because of this error, but I don't understand how to fix it with Nix 14:11:37
@hexa:lossy.networkhexacan you show your inputs?14:13:08
@hexa:lossy.networkhexaideally you should only have a single nixpkgs14:13:44
@hexa:lossy.networkhexaand everything else should follow it14:13:48
@rav:vergara.techRene

I do, everything follows:

─nixpkgs: github:nixos/nixpkgs/a493e93b4a259cd9fea8073f89a7ed9b1c5a1da2
14:17:04
@rav:vergara.techRene I don't even have a cargo-1.79 entry in /nix/store, I have no idea why the error says that 14:20:24
@rav:vergara.techRene Here's what I have found so far. If I revert the changes to the crate versions, the flake will start the devShell, with cargo-1.86. From what I read, I need at least 1.87 to fix the broken crate. 16:34:46
@rav:vergara.techRenebut I'm on the latest nightly, why would Cargo be from back in Feb?16:35:09
@rav:vergara.techRene In case it helps anyone, it turns out that the cargo-c crate has a (somehow) embedded Cargo. The fix was to move to nixpkgs-unstable, where cargo-c has a version of Cargo compatible with the base64ct crate. 20:01:28
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17 Oct 2025
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22 Oct 2025
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@cortsf:matrix.orgcortsf Hello. Can I have some help? I'm trying to publish a flake (using haskell.nix) into nixpkgs. Not sure if using builtins.getFlake is ok, since there is no derivation using it apparently. 01:09:25
@cortsf:matrix.orgcortsfhttps://github.com/cortsf/hympd01:09:47
@cortsf:matrix.orgcortsf

This seems to work locally.

{ pkgs ? import <nixpkgs> {} }:
let
  hympdFlake = builtins.getFlake "github:cortsf/hympd?rev=ea295556192e4c436917313da11211d8b1d47299";
  hympdPackage = hympdFlake.packages.${pkgs.system}.default;
in
pkgs.stdenv.mkDerivation {
  pname = "hympd";
  version = "1.0";
  src = ./.;
  buildInputs = [ hympdPackage ];
  # buildPhase = ''
  #   echo "Using my-package from the other flake: ${myPackage}/bin/some-command"
  # '';
  installPhase = ''
    mkdir -p $out/bin
    cp ${hympdPackage}/bin/hympd $out/bin
  '';
}

01:10:02
@cortsf:matrix.orgcortsf *

This seems to work locally.

{ pkgs ? import <nixpkgs> {} }:
let
  hympdFlake = builtins.getFlake "github:cortsf/hympd?rev=ea295556192e4c436917313da11211d8b1d47299";
  hympdPackage = hympdFlake.packages.${pkgs.system}.default;
in
pkgs.stdenv.mkDerivation {
  pname = "hympd";
  version = "1.0";
  src = ./.;
  buildInputs = [ hympdPackage ];
  installPhase = ''
    mkdir -p $out/bin
    cp ${hympdPackage}/bin/hympd $out/bin
  '';
}

01:13:55

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