Build failure: avrlibc

[Ben-Miller0]

Steps To Reproduce

Steps to reproduce the behavior:

1. build the flake

   {
   description = "Avr Dev Env";
   
   inputs = {
   nixpkgs.url = "nixpkgs/nixos-unstable";
   };
   
   outputs = { self, nixpkgs, ... }:
   {
     devShell."x86_64-linux" =
       let
         pkgs = import nixpkgs {
           system = "x86_64-linux";
         };
         avr = with pkgs.pkgsCross.avr.buildPackages; [
           binutils
           gcc
           avrdude
           avrlibc
         ];
       in
       pkgs.mkShell {
         name = "Wearables-shell";
         buildInputs = avr;
       };
   };
   }

Build log

Build Log

``` error: … while calling the 'derivationStrict' builtin at :34:12: 33| 34| strict = derivationStrict drvAttrs; | ^ 35| … while evaluating derivation 'Wearables-shell' whose name attribute is located at /nix/store/c9wv7i0af6mysmy65x6nvyfw5izzxv4g-source/pkgs/stdenv/generic/make-derivation.nix:336:7 … while evaluating attribute 'buildInputs' of derivation 'Wearables-shell' at /nix/store/c9wv7i0af6mysmy65x6nvyfw5izzxv4g-source/pkgs/stdenv/generic/make-derivation.nix:383:7: 382| depsHostHost = elemAt (elemAt dependencies 1) 0; 383| buildInputs = elemAt (elemAt dependencies 1) 1; | ^ 384| depsTargetTarget = elemAt (elemAt dependencies 2) 0; (stack trace truncated; use '--show-trace' to show the full, detailed trace) error: Package ‘avr-libc-2.2.1’ in /nix/store/c9wv7i0af6mysmy65x6nvyfw5izzxv4g-source/pkgs/development/misc/avr/libc/default.nix:26 is not available on the requested hostPlatform: hostPlatform.config = "x86_64-unknown-linux-gnu" package.meta.platforms = [ "avr-none" ] package.meta.badPlatforms = [ ] , refusing to evaluate. a) To temporarily allow packages that are unsupported for this system, you can use an environment variable for a single invocation of the nix tools. $ export NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake, then pass `--impure` in order to allow use of environment variables. b) For `nixos-rebuild` you can set { nixpkgs.config.allowUnsupportedSystem = true; } in configuration.nix to override this. c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add { allowUnsupportedSystem = true; } to ~/.config/nixpkgs/config.nix. ```

Additional context

none

Metadata

• system: "x86_64-linux"
• host os: Linux 6.6.61, NixOS, 25.05 (Warbler), 25.05beta708622.5e4fbfb6b3de
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.24.10
• channels(root): "home-manager, nixos, nixos-24.05-24.05"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

Notify maintainers

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Add a :+1: reaction to issues you find important.

[FliegendeWurst]

Have you tried setting NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 or one of the other quick fixes?

[Ben-Miller0]

Can you do that inside a flake?

[FliegendeWurst]

Yes, using --impure:

Note: When using nix shell, nix build, nix develop, etc with a flake, then pass --impure in order to allow use of environment variables.

[Ben-Miller0]

i mean something in the flake.nix that reproduceably does that.

[Ben-Miller0]

this is what i get if i try doing what you say

Running phase: unpackPhase
@nix { "action": "setPhase", "phase": "unpackPhase" }
unpacking source archive /nix/store/r8kvbay6x1d13zl93fgj18pgzyg5q0a4-avr-libc-2.2.1.tar.bz2
source root is avr-libc-2.2.1
setting SOURCE_DATE_EPOCH to timestamp 1721363985 of file avr-libc-2.2.1/avr-libc.spec
Running phase: patchPhase
@nix { "action": "setPhase", "phase": "patchPhase" }
Running phase: updateAutotoolsGnuConfigScriptsPhase
@nix { "action": "setPhase", "phase": "updateAutotoolsGnuConfigScriptsPhase" }
Updating Autotools / GNU config script to a newer upstream version: ./config.sub
Updating Autotools / GNU config script to a newer upstream version: ./config.guess
Running phase: configurePhase
@nix { "action": "setPhase", "phase": "configurePhase" }
patching script interpreter paths in ./configure
./configure: interpreter directive changed from "#! /bin/sh" to "/nix/store/0irlcqx2n3qm6b1pc9rsd2i8qpvcccaj-bash-5.2p37/bin/sh"
configure flags: --disable-dependency-tracking --prefix=/nix/store/wawhvkwgzf4ylf9dnqrvrdg5blr3zdxw-avr-libc-2.2.1
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking if configuring for cross compile... no
configure: WARNING: 
configure: WARNING: AVR-LibC must be built using an avr cross-compiler.
configure: WARNING: Try configuring with:
configure: WARNING: "./configure --build=`./config.guess` --host=avr"
configure: WARNING: 
configure: error: aborting configure

[FliegendeWurst]

Why do you use avr.buildPackages and not just avr?

[FliegendeWurst]

I'm asking because the error message actually suggests you are trying to build avrlibc for your build platform.

[Ben-Miller0]

how are you supposed to build avrlibc

[FliegendeWurst]

I'd assume

          avr = with pkgs.pkgsCross.avr; [
            binutils
            gcc
            avrdude
            avrlibc
          ];

but I did not test.

[Ben-Miller0]

doesn't work

[trofi]

pkgsCross.avr.stdenv.cc.libc is in the cache on hydra.

[Ben-Miller0]

this flake works

{
  description = "Avr Dev Env";

  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
  };

  outputs = { self, nixpkgs, ... }:
    {
      devShell."x86_64-linux" =
        let
          pkgs = import nixpkgs {
            system = "x86_64-linux";
          };
          avr = with pkgs.pkgsCross.avr; [
            stdenv.cc
            stdenv.cc.libc
          ];
        in
        pkgs.mkShell {
          name = "Wearables-shell";
          buildInputs = avr;
          nativeBuildInputs = with pkgs; [ avrdude ];
        };
    };
}