realised how self' is supposed to work and removed all stdenv bullshit

modules/features/nvim/default.nix

@@ -1,24 +1,11 @@
-{
-  self,
-  inputs,
-  ...
-}: {
-  flake.nixosModules.nvim = {
-    pkgs,
-    lib,
-    ...
-  }: {
+{moduleWithSystem, ...}: {
+  flake.nixosModules.nvim = moduleWithSystem ({self', ...}: {
     programs.nvim = {
       enable = true;
-      package = self.packages.${pkgs.stdenv.hostPlatform.system}.nvim;
+      package = self'.packages.nvim;
     };
-  };
-  perSystem = {
-    pkgs,
-    lib,
-    self',
-    ...
-  }: {
-    packages.nvim = inputs.nvim.packages.${pkgs.stdenv.hostPlatform.system}.default;
+  });
+  perSystem = {inputs', ...}: {
+    packages.nvim = inputs'.nvim.packages.default;
   };
 }