legcord: add autoPatchElfHook for venmic module

[wrmilling]

Attempting to address issue as expressed in: #383696 (comment)

Things done

Added autoPatchElfHook so that the venmic node.js module can be patched at build time.

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[wrmilling]

@nyabinary Can you take a look as see if this fixes the issue you are having? I will convert it to a full PR if it does resolve the problem.

[nyabinary]

@nyabinary Can you take a look as see if this fixes the issue you are having? I will convert it to a full PR if it does resolve the problem.

Nope, didn't work, outputs this when I screenshare (in terminal).

WebRTC Capturer detected, using native window picker.
'loop->recurse > 0' failed at ../src/pipewire/thread-loop.c:425 pw_thread_loop_wait()
trying to import /nix/store/f8x40cl8ghmzb4i6ddgs4n81bifq2dk2-legcord-1.1.0/share/lib/legcord/resources/app.asar/dist/venmic-x64.node
Failed to import Venmic module Error: Cannot find module '/nix/store/f8x40cl8ghmzb4i6ddgs4n81bifq2dk2-legcord-1.1.0/share/lib/legcord/resources/app.asar/dist/venmic-x64.node'
Require stack:
- /nix/store/f8x40cl8ghmzb4i6ddgs4n81bifq2dk2-legcord-1.1.0/share/lib/legcord/resources/app.asar/ts-out/main-Dy_lruhE.js
    at Module._resolveFilename (node:internal/modules/cjs/loader:1232:15)
    at s._resolveFilename (node:electron/js2c/browser_init:2:124485)
    at Module._load (node:internal/modules/cjs/loader:1058:27)
    at c._load (node:electron/js2c/node_init:2:16955)
    at Module.require (node:internal/modules/cjs/loader:1318:19)
    at require (node:internal/modules/helpers:179:18)
    at Qt (file:///nix/store/f8x40cl8ghmzb4i6ddgs4n81bifq2dk2-legcord-1.1.0/share/lib/legcord/resources/app.asar/ts-out/main-Dy_lruhE.js:48:645)
    at G (file:///nix/store/f8x40cl8ghmzb4i6ddgs4n81bifq2dk2-legcord-1.1.0/share/lib/legcord/resources/app.asar/ts-out/main-Dy_lruhE.js:48:891)
    at file:///nix/store/f8x40cl8ghmzb4i6ddgs4n81bifq2dk2-legcord-1.1.0/share/lib/legcord/resources/app.asar/ts-out/main-Dy_lruhE.js:48:1376
    at WebContents.<anonymous> (node:electron/js2c/browser_init:2:87415) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/nix/store/f8x40cl8ghmzb4i6ddgs4n81bifq2dk2-legcord-1.1.0/share/lib/legcord/resources/app.asar/ts-out/main-Dy_lruhE.js'
  ]
}
Obtained Venmic module

[wrmilling]

Nope, didn't work, outputs this when I screenshare (in terminal).

Thank, will try to reproduce locally, may be a bit before I can dig into it though.