diff --git a/.config/nvim/lua/rocketcamel/plugins/lsp.lua b/.config/nvim/lua/rocketcamel/plugins/lsp.lua
index 5ca0f8a..91f4dab 100644
--- a/.config/nvim/lua/rocketcamel/plugins/lsp.lua
+++ b/.config/nvim/lua/rocketcamel/plugins/lsp.lua
@@ -72,6 +72,9 @@ return {
 			vim.keymap.set("n", "K", function()
 				vim.lsp.buf.hover({ border = "rounded" })
 			end)
+			vim.keymap.set("i", "<C-s>", function()
+				vim.lsp.buf.signature_help({ border = "rounded" })
+			end)
 			vim.diagnostic.config({ virtual_text = true })
 			cmp.setup.cmdline({ "/", "?" }, {
 				mapping = cmp.mapping.preset.cmdline(),
diff --git a/nix/modules/commonPackages.nix b/nix/modules/commonPackages.nix
index a63dcab..dc2aee6 100644
--- a/nix/modules/commonPackages.nix
+++ b/nix/modules/commonPackages.nix
@@ -28,7 +28,6 @@
       ripgrep
       git
       gcc
-      rustup
       nixfmt-rfc-style
       asciiquarium
       wireguard-tools
@@ -47,6 +46,8 @@
       gnumake
       watchman
       bat
+      cargo
+      rustc
     ];
     programs.nix-ld.enable = lib.mkDefault true;
     programs.zsh.enable = lib.mkDefault true;