libargon2 not woking with the argon2 package

[MarcCoquand]

Heya!

I can't quite figure out if this is an issue with opam-nix or an issue upstream. I am running into the issue:

Fatal error: exception Dl.DL_error("dlopen(libargon2.so.1, 0x000A): tried: 'libargon2.so.1' (no such file), '/System/Volumes/Preboot/Cryptexes/OSlibargon2.so.1' (no such file), '/nix/store/1icn9va0m09gi8l64061f49gdwjq2pbd-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/libargon2.so.1' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/nix/store/1icn9va0m09gi8l64061f49gdwjq2pbd-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/libargon2.so.1' (no such file), '/nix/store/1icn9va0m09gi8l64061f49gdwjq2pbd-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/libargon2.so.1' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/nix/store/1icn9va0m09gi8l64061f49gdwjq2pbd-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/libargon2.so.1' (no such file), '/usr/lib/libargon2.so.1' (no such file, not in dyld cache), 'libargon2.so.1' (no such file), '/usr/local/lib/libargon2.so.1' (no such file), '/usr/lib/libargon2.so.1' (no such file, not in dyld cache)")

When trying to run an ocaml project that makes use of argon2. I can see that argon2 is installed, as the argon2 command is available in nix develop. However, the above error shows up when I try to run my dune project.

I have the following flake

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs";
    opam-nix.url = "github:tweag/opam-nix";
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs.follows = "opam-nix/nixpkgs";
  };
  outputs = { self, flake-utils, opam-nix, nixpkgs }@inputs:
    let package = "minimal_error";
    in flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        on = opam-nix.lib.${system};
        devPackagesQuery = {
          # You can add "development" packages here. They will get added to the devShell automatically.
          ocaml-lsp-server = "*";
          ocamlformat = "*";
          ocamlfind = "1.9.5";
          utop = "*";
        };
        query = devPackagesQuery // {
          ## You can force versions of certain packages here, e.g:
          ## - force the ocaml compiler to be taken from opam-repository:
          ocaml-base-compiler = "*";
          ## - or force the compiler to be taken from nixpkgs and be a certain version:
          # ocaml-system = "4.14.0";
          ## - or force ocamlfind to be a certain version:
        };
        scope = on.buildOpamProject' { } ./. query;
        overlay = final: prev: {
          # You can add overrides here
          ${package} = prev.${package}.overrideAttrs (_: {
            # Prevent the ocaml dependencies from leaking into dependent environments
            doNixSupport = false;
          });
        };
        scope' = scope.overrideScope' overlay;
        # The main package containing the executable
        main = scope'.${package};
        # Packages from devPackagesQuery
        devPackages = builtins.attrValues
          (pkgs.lib.getAttrs (builtins.attrNames devPackagesQuery) scope');
      in {
        legacyPackages = scope';

        packages.default = main;

        devShells.default = pkgs.mkShell {
          inputsFrom = [ main ];
          buildInputs = devPackages ++ [
            # You can add packages from nixpkgs here
            pkgs."gmp"
            pkgs."libev"
            pkgs."openssl"
            pkgs."libargon2"
          ];
        };
      });
}

And I created a small reproducible sample here: https://git.sr.ht/~marcc/minimalerror/tree.

My suspicion is that it's not able to reference the library from path, as I was able to resolve this on linux by adding

export LD_LIBRARY_PATH=$(nix eval --raw nixpkgs#libargon2.outPath)/lib:$LD_LIBRARY_PATH

Same solution does not work on Mac though.

[MarcCoquand]

Heya!

It turned out the issue was in fact downstream with argon2 itself. It has to do with argon2 v.1.0.2 not being published (ocaml/opam-repository#24314). It fixes the issue