diff --git a/lua/nvim-cmp-config.lua b/lua/nvim-cmp-config.lua
index 1653be7..04edc88 100644
--- a/lua/nvim-cmp-config.lua
+++ b/lua/nvim-cmp-config.lua
@@ -13,8 +13,8 @@ cmp.setup({
 	},
 	mapping = {
 		-- Add tab support
-		["<S-Tab>"] = cmp.mapping.select_prev_item(),
-		["<Tab>"] = cmp.mapping.select_next_item(),
+		["<Up>"] = cmp.mapping.select_prev_item(),
+		["<Down>"] = cmp.mapping.select_next_item(),
 		["<C-S-f>"] = cmp.mapping.scroll_docs(-4),
 		["<C-f>"] = cmp.mapping.scroll_docs(4),
 		["<C-Space>"] = cmp.mapping.complete(),
diff --git a/nix/package.nix b/nix/package.nix
index e2b9138..4d505e1 100644
--- a/nix/package.nix
+++ b/nix/package.nix
@@ -43,8 +43,8 @@ pkgs.writeTextFile {
   executable = true;
   destination = "/bin/nvim";
   text = ''
-          #!${pkgs.bash}
-         export PATH=${lib.makeBinPath deps}:$PATH
+    #!${pkgs.bash}/bin/bash
+    export PATH=${lib.makeBinPath deps}:$PATH
     export LUA_PATH=${../.}/lua/?.lua
     ${pkgs.neovim}/bin/nvim -u ${../.}/init.lua $@
   '';