Try using nix-provided nodehun

codedown.nix

@@ -47,7 +47,7 @@ rec {
 
   nixpkgsStableSearcher = common.searcher pkgsStable;
 
-  spellchecker = callPackage ./language_servers/markdown-spellcheck-lsp {};
+  spellchecker = pkgsUnstable.callPackage ./language_servers/markdown-spellcheck-lsp {};
 
   shells = {
     zsh = callPackage ./shells/zsh {};

language_servers/markdown-spellcheck-lsp/default.nix

@@ -1,17 +1,21 @@
-{ lib
-, callPackage
+{ callPackage
 , fetchFromGitHub
+, lib
+, makeWrapper
+, runCommand
+, stdenv
+
 , hunspell
 , hunspellDicts
 , hunspellWithDicts
-, makeWrapper
+
 , node2nix
 , nodePackages
+, nodehun
 , nodejs-18_x
 , nodejs-slim-18_x
+
 , python3
-, stdenv
-, runCommand
 , unixtools
 }:
 
@@ -22,57 +26,13 @@ let
 
   nodejs = nodejs-slim-18_x;
 
-  nodehunWithNix = stdenv.mkDerivation {
-    name = "nodehun-with-nix";
-    src = fetchFromGitHub {
-      owner = "Wulf";
-      repo = "nodehun";
-      rev = "03c9dcf1fcd965031a68553ccaf6487d1fe87f79";
-      sha256 = "13baqdxq8m1rvcqpdx5kwwk32xppwv9k29d2w55ash48akk3v1ij";
-    };
-
-    dontConfigure = true;
-    dontFixup = true;
-
-    doCheck = false;
-
-    buildInputs = [node2nix];
-
-    buildPhase = "node2nix -18 -l package-lock.json";
-
-    installPhase = "cp -r ./. $out";
-  };
-
   nodeHeaders = runCommand "node-${nodejs.version}-headers.tar.gz" { buildInputs = []; } ''
     dir="node-v${nodejs.version}"
     mkdir "$dir"
     cp -r ${nodejs}/include "$dir"
     tar -czvf $out "$dir"
   '';
 
-  nodehun = (callPackage nodehunWithNix { nodejs = nodejs-18_x; }).package.override {
-    preRebuild = ''
-      npm run build -- --tarball ${nodeHeaders}
-    '';
-
-    buildInputs = [python3 nodePackages.node-gyp stdenv];
-
-    disallowedReferences = [ nodejs ];
-
-    postInstall = ''
-      # Only keep the necessary parts of build/Release to reduce closure size
-      cd $out/lib/node_modules/nodehun
-      mv build build_old
-      mkdir build
-      cp -r build_old/Release build/
-      rm -rf build_old
-      rm -rf build/Release/.deps
-
-      # Remove a development script to eliminate runtime dependency on node
-      rm node_modules/node-addon-api/tools/conversion.js
-    '';
-  };
-
   indexJs = stdenv.mkDerivation {
     name = "markdown-spellcheck-lsp-index.js";