only enable nvim_lsp cmp source on desktop

config/programs/vim/configuration.nix

@@ -89,6 +89,8 @@ in {
       "config.undodir"
     ];
 
+    vim.g.isDesktop = config.isDesktop;
+
     output.path.path = with pkgs; [ripgrep];
   };
   options.isDesktop = lib.options.mkEnableOption "desktop integration and LSP";

config/programs/vim/modules/lsp/cmp.nix

@@ -1,12 +1,22 @@
-{pkgs, ...}: {
-  output.plugins = with pkgs.vimPlugins; [
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}: {
+  output.plugins = with pkgs.vimPlugins;
+    [
       nvim-cmp
       cmp-cmdline
       cmp-path
       cmp-buffer
-    cmp-nvim-lsp
       cmp_luasnip
       cmp-git
-  ];
+    ]
+    ++ (
+      if config.isDesktop
+      then [cmp-nvim-lsp]
+      else []
+    );
   extraLuaModules = ["config.cmp"];
 }

config/programs/vim/modules/lua/config/cmp.lua

@@ -19,12 +19,10 @@ cmp.setup({
         ['<C-e>'] = cmp.mapping.abort(),
         ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
     }),
-    sources = cmp.config.sources({
-        { name = 'nvim_lsp' },
-        { name = 'vsnip' }, -- For vsnip users.
-        -- { name = 'luasnip' }, -- For luasnip users.
-        -- { name = 'ultisnips' }, -- For ultisnips users.
-        -- { name = 'snippy' }, -- For snippy users.
+    sources = cmp.config.sources(
+    vim.g.isDesktop and {{ name = 'nvim_lsp' }} or {},
+    {
+        { name = 'luasnip' },
     }, {
         { name = 'buffer' },
     })