diff --git a/.gitignore b/.gitignore
index 97fed7b949..57acde8722 100644
--- a/.gitignore
+++ b/.gitignore
@@ -74,4 +74,10 @@ tags
 # vim patches
 /vim-*.patch
 
+# nix build results
+/result
+/result-*
+/contrib/result
+/contrib/result-*
+
 CMakeUserPresets.json
diff --git a/contrib/flake.lock b/contrib/flake.lock
index 69182ad1e5..c6dfb4642b 100644
--- a/contrib/flake.lock
+++ b/contrib/flake.lock
@@ -17,11 +17,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1669052418,
-        "narHash": "sha256-M1I4BKXBQm2gey1tScemEh5TpHHE3gKptL7BpWUvL8s=",
+        "lastModified": 1671983799,
+        "narHash": "sha256-Z2Ro6hFPZHkBqkVXY5/aBUzxi5xizQGvuHQ9+T5B/ks=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "20fc948445a6c22d4e8d5178e9a6bc6e1f5417c8",
+        "rev": "fad51abd42ca17a60fc1d4cb9382e2d79ae31836",
         "type": "github"
       },
       "original": {
diff --git a/contrib/flake.nix b/contrib/flake.nix
index 8df1768827..68793f6823 100644
--- a/contrib/flake.nix
+++ b/contrib/flake.nix
@@ -8,15 +8,11 @@
 
   outputs = { self, nixpkgs, flake-utils }:
     {
-      overlay = final: prev: rec {
+      overlay = final: prev: {
 
         neovim = final.neovim-unwrapped.overrideAttrs (oa: {
           version = "master";
           src = ../.;
-
-          buildInputs = oa.buildInputs
-            ++ final.lib.optionals final.stdenv.isDarwin
-            (with final.darwin.apple_sdk.frameworks; [ CoreServices ]);
         });
 
         # a development binary to help debug issues
@@ -25,7 +21,7 @@
             final.llvmPackages_latest.stdenv
           else
             final.stdenv;
-        in ((neovim.override {
+        in (final.neovim.override {
           lua = final.luajit;
           inherit stdenv;
         }).overrideAttrs (oa: {
@@ -37,13 +33,13 @@
           cmakeFlags = oa.cmakeFlags ++ [ "-DMIN_LOG_LEVEL=0" ];
 
           disallowedReferences = [ ];
-        }));
+        });
 
         # for neovim developers, beware of the slow binary
-        neovim-developer = let luacheck = final.luaPackages.luacheck;
-        in (neovim-debug.override ({
+        neovim-developer = let inherit (final.luaPackages) luacheck;
+        in (final.neovim-debug.override {
           doCheck = final.stdenv.isLinux;
-        })).overrideAttrs (oa: {
+        }).overrideAttrs (oa: {
           cmakeFlags = oa.cmakeFlags ++ [
             "-DLUACHECK_PRG=${luacheck}/bin/luacheck"
             "-DMIN_LOG_LEVEL=0"
@@ -113,15 +109,10 @@
               # ASAN_OPTIONS=detect_leaks=1
               export ASAN_OPTIONS="log_path=./test.log:abort_on_error=1"
               export UBSAN_OPTIONS=print_stacktrace=1
-              mkdir -p build/runtime/parser
-              # nvim looks into CMAKE_INSTALL_DIR. Hack to avoid errors
-              # when running the functionaltests
-              mkdir -p outputs/out/share/nvim/syntax
-              touch outputs/out/share/nvim/syntax/syntax.vim
 
               # for treesitter functionaltests
               mkdir -p runtime/parser
-              cp -f ${pkgs.tree-sitter.builtGrammars.tree-sitter-c}/parser runtime/parser/c.so
+              cp -f ${pkgs.vimPlugins.nvim-treesitter.builtGrammars.c}/parser runtime/parser/c.so
             '';
           });
         };