fennel: Add direct readline dependency

overlay-patches.nix

@@ -1,7 +1,16 @@
 self: super: {
   fennel-luajit = super.fennel.overrideAttrs (
+    let
+      luaPackages = with super.luajitPackages; [ readline ];
+    in
     o: rec {
-      buildInputs = [ super.luajit ];
+      buildInputs = [ super.luajit super.makeWrapper ] ++ luaPackages;
+
+      postInstall = o.postInstall or "" + ''
+        wrapProgram $out/bin/fennel \
+          --suffix LUA_CPATH ";" "${super.lib.concatMapStringsSep ";" super.luajitPackages.getLuaCPath luaPackages}" \
+          --suffix LUA_PATH ";" "${super.lib.concatMapStringsSep ";" super.luajitPackages.getLuaPath luaPackages}"
+      '';
     }
   );
 }

programs/nvim/default.nix

@@ -46,7 +46,7 @@ in
       sumneko-lua-language-server
       taplo-lsp
 
-      # LSP Tools
+      # Diagnostic Tools
       deadnix
       hadolint
       fennel-luajit
@@ -56,8 +56,6 @@ in
       statix
     ];
 
-    extraLuaPackages = with pkgs.luajitPackages; [ readline ];
-
     plugins = (with customPlugins; [
       # Fixes
       impatient-nvim