diff --git a/contrib/flake.nix b/contrib/flake.nix
index 57e56d0fdb..51c2014d6c 100644
--- a/contrib/flake.nix
+++ b/contrib/flake.nix
@@ -134,7 +134,6 @@
 
             buildInputs = with pkgs;
               oa.buildInputs ++ [
-                cmake
                 lua.pkgs.luacheck
                 sumneko-lua-language-server
                 pythonEnv
@@ -142,6 +141,10 @@
                 jq # jq for scripts/vim-patch.sh -r
                 shellcheck # for `make shlint`
                 doxygen # for script/gen_vimdoc.py
+              ];
+
+            nativeBuildInputs = with pkgs;
+              oa.nativeBuildInputs ++ [
                 clang-tools # for clangd to find the correct headers
               ];