{
  description = "Flake utils demo";

  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  inputs.flake-utils.url = "github:numtide/flake-utils";

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
    let
      pkgs = import nixpkgs {
        inherit system;
        crossSystem = nixpkgs.lib.systems.examples.armv7l-hf-multiplatform;
      };
    in {
      packages.default = pkgs.stdenv.mkDerivation {
        name = "test";

        src = self;

        nativeBuildInputs = with pkgs; [
          cmake
        ];
      };
    }
    );
}

Et l'erreur lors du nix build:

cmake flags: -DCMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY=OFF -DCMAKE_FIND_USE_PACKAGE_REGISTRY=OFF -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTING=OFF -DCMAKE_INSTALL_LOCALEDIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/share/locale -DCMAKE_INSTALL_LIBEXECDIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/libexec -DCMAKE_INSTALL_LIBDIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/lib -DCMAKE_INSTALL_DOCDIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/share/doc/hello_world -DCMAKE_INSTALL_INFODIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/share/info -DCMAKE_INSTALL_MANDIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/share/man -DCMAKE_INSTALL_OLDINCLUDEDIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/include -DCMAKE_INSTALL_INCLUDEDIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/include -DCMAKE_INSTALL_SBINDIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/sbin -DCMAKE_INSTALL_BINDIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/bin -DCMAKE_INSTALL_NAME_DIR=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf/lib -DCMAKE_POLICY_DEFAULT_CMP0025=NEW -DCMAKE_OSX_SYSROOT= -DCMAKE_FIND_FRAMEWORK=LAST -DCMAKE_STRIP=/nix/store/p8wcbhdp97k1qqmvrwyjfgfdjnv1rays-armv7l-unknown-linux-gnueabihf-stage-final-gcc-wrapper-12.3.0/bin/armv7l-unknown-linux-gnueabihf-strip -DCMAKE_RANLIB=/nix/store/p8wcbhdp97k1qqmvrwyjfgfdjnv1rays-armv7l-unknown-linux-gnueabihf-stage-final-gcc-wrapper-12.3.0/bin/armv7l-unknown-linux-gnueabihf-ranlib -DCMAKE_AR=/nix/store/p8wcbhdp97k1qqmvrwyjfgfdjnv1rays-armv7l-unknown-linux-gnueabihf-stage-final-gcc-wrapper-12.3.0/bin/armv7l-unknown-linux-gnueabihf-ar -DCMAKE_C_COMPILER=armv7l-unknown-linux-gnueabihf-gcc -DCMAKE_CXX_COMPILER=armv7l-unknown-linux-gnueabihf-g++ -DCMAKE_INSTALL_PREFIX=/nix/store/mlinpzzxpp82lgza8zd4w16ycp436pnn-test-armv7l-unknown-linux-gnueabihf -DCMAKE_SYSTEM_NAME=Linux -DCMAKE_SYSTEM_PROCESSOR=armv7l -DCMAKE_HOST_SYSTEM_NAME=Linux -DCMAKE_HOST_SYSTEM_PROCESSOR=x86_64
       > /nix/store/ws4rbcpm5zn4zbp8l0iykkddh8r84vvq-cmake-armv7l-unknown-linux-gnueabihf-3.26.4/nix-support/setup-hook: line 126: /nix/store/ws4rbcpm5zn4zbp8l0iykkddh8r84vvq-cmake-armv7l-unknown-linux-gnueabihf-3.26.4/bin/cmake: cannot execute binary file: Exec format error

Et le coup de file sur le fameux fichier bin/cmake:

/nix/store/ws4rbcpm5zn4zbp8l0iykkddh8r84vvq-cmake-armv7l-unknown-linux-gnueabihf-3.26.4/bin/cmake: ELF 32-bit LSB executable, ARM, EABI5 version 1 (GNU/Linux), dynamically linked, interpreter /nix/store/13ykb60xn38c57pvksyrbc8fw8mfkhcs-glibc-armv7l-unknown-linux-gnueabihf-2.37-8/lib/ld-linux-armhf.so.3, for GNU/Linux 3.10.0, not stripped

In reply to @Zevran:matrix.org
pourquoi tu as mis src = self; ?

In reply to @Zevran:matrix.org
Un oeil avisé pourrait review cette PR ? https://github.com/NixOS/nixpkgs/pull/239803 :D

In reply to @putch4r:matrix.org
hello .
je prefere demander avant. mais c'est mandatory le port 8080 et le /metrics ? ou alors on peut les surcharger ?