Help installing a Luarocks package

Help
1

I’ve been stuck for the past week trying to install a certain Luarocks package, specifically “enet” bindings for lua. I haven’t been able to find any good resources about how to do this. I can use Luarocks locally but when I go to run a program which requires the library, it says libenet.so.7: cannot open shared object file: No such file or directory which I think means it can’t find the base enet library.

But I have enet in my “configuration.nix” so I have no clue why It doesnt find it there.

Any help would be appreciated

2

Which program are you trying to run, how are you running it, and how did you install it?

3

My own lua script which uses enet for networking stuff. I made it when I was on ubuntu, but now that I’m on nix I can’t seem to use Luarocks to get it like I did before.

Running it just by “lua script.lua” and I get the same result no matter which lua version I use.

4

So after even more trial and error, I came across luarocks-nix and used that to generate a .nix script for the package I needed. This does not work on its own though and I had to edit it to add the base enet package. Specifically the propagatedBuildInputs = [ pkgs.enet ]; line.

{ pkgs, lib, buildLuarocksPackage, fetchFromGitHub, fetchurl, luaOlder }:
buildLuarocksPackage {
  pname = "enet";
  version = "1.2-1";
  knownRockspec = (fetchurl {
    url    = "mirror://luarocks/enet-1.2-1.rockspec";
    sha256 = "0jf0qxf3lsrmc1dww7b7i6srqp2cy8caqv9f1rbva7f6rnppxzra";
  }).outPath;
  src = fetchFromGitHub {
    owner = "leafo";
    repo = "lua-enet";
    rev = "v1.2";
    hash = "sha256-GomfJAPbR+y469LuaNPrkab0Wd3xAsAhT4uqbDo8BUA=";
  };

  disabled = luaOlder "5.1";
  propagatedBuildInputs = [ pkgs.enet ];

  meta = {
    homepage = "http://leafo.net/lua-enet";
    description = "A library for doing network communication in Lua";
    license.fullName = "MIT";
  };
}

I then added (luajitPackages.callPackage ./lua-enet.nix {}) to my configuration.nix to load it, and now my script can recognize enet when I run it with luajit.

No clue if this is the correct way, but it works. Hope this saves others the time and frustration I had to go through.

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