Add config as an overlay

flake.nix

@@ -64,12 +64,19 @@
     overlays = {
       nixpkgs.overlays = [
         (import ./overlays inputs)
-        neovim-nightly.overlays.default
+        nvim-overlay
       ];
     };
 
     mkSystem = import ./lib/mksystem.nix (inputs // {inherit overlays inputs;});
     eachSystem = nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed;
+
+    nvim-overlay = final: prev:
+      import ./nvim (inputs
+        // {
+          pkgs = prev.pkgs;
+          lib = nixpkgs.lib;
+        });
   in {
     nixosConfigurations.fuhen = mkSystem "fuhen" {
       env = "river";
@@ -112,32 +119,33 @@
     };
 
     packages = eachSystem (system: let
-      pkgs = nixpkgs.legacyPackages.${system};
-      vim = import ./nvim (inputs
-        // {
-          inherit pkgs;
-          lib = nixpkgs.lib;
-        });
+      pkgs = import nixpkgs {
+        inherit system;
+        overlays = [nvim-overlay];
+      };
     in rec {
       default = nvim;
-      nvim = vim.nvim;
+      nvim = pkgs.nvim;
     });
 
     devShells = eachSystem (system: let
-      pkgs = nixpkgs.legacyPackages.${system};
-      vim = import ./nvim (inputs
-        // {
-          inherit pkgs;
-          lib = nixpkgs.lib;
-        });
+      pkgs = import nixpkgs {
+        inherit system;
+        overlays = [nvim-overlay];
+      };
     in rec {
       default = nvim-lua;
       nvim-lua = pkgs.mkShell {
         name = "nvim-lua";
         shellHook = ''
-          ln -fs ${vim.luarc} .luarc.json
+          ln -fs ${pkgs.nvim-luarc} .luarc.json
         '';
       };
     });
+
+    overlays = rec {
+      default = nvim;
+      nvim = nvim-overlay;
+    };
   };
 }

modules/cli/zsh/default.nix

@@ -23,9 +23,9 @@
       glow
       gh
       yq
-      alejandra
       nodePackages.http-server
       nodePackages.live-server
+      nvim
     ]
     ++ lib.optionals pkgs.stdenv.isLinux [
       usbutils

nvim/default.nix

@@ -1,11 +1,12 @@
 {
   pkgs,
+  lib,
   neovim-nightly,
   lz-nvim,
   vim-lumen,
   ...
 }: let
-  mkNvim = pkgs.callPackage ./nix/mknvim.nix {inherit pkgs;};
+  mkNvim = import ./nix/mknvim.nix {inherit pkgs lib;};
 
   mkPlugin = src: pname:
     pkgs.vimUtils.buildVimPlugin {
@@ -14,8 +15,6 @@
     };
 in
   mkNvim {
-    name = "nvim";
-
     withNodeJs = false;
     withRuby = false;
     withPython3 = false;
@@ -135,6 +134,9 @@ in
       zls
       lua-language-server
 
+      # nix formatter
+      alejandra
+
       # Give access to gdbus for color-scheme detection (vim-lumen).
       glib
     ];

nvim/nix/mknvim.nix

@@ -1,10 +1,8 @@
 {
   pkgs,
   lib,
-  stdenv,
   ...
 }: {
-  name ? "nvim",
   package ? pkgs.neovim,
   config,
   plugins ? {
@@ -90,7 +88,7 @@
       ${builtins.readFile (config + "/init.lua")}
     '';
 in {
-  ${name} = pkgs.wrapNeovimUnstable nvim {
+  nvim = pkgs.wrapNeovimUnstable nvim {
     wrapRc = false;
     wrapperArgs = builtins.concatStringsSep " " [
       (lib.optionals (extraPackages != []) ''--prefix PATH : "${lib.makeBinPath extraPackages}"'')
@@ -100,5 +98,5 @@ in {
     inherit withPython3 withNodeJs withPerl withRuby extraPython3Packages extraLuaPackages;
   };
 
-  luarc = mkLuarc { nvim = package; inherit plugins; };
+  nvim-luarc = mkLuarc { nvim = package; inherit plugins; };
 }