diff --git a/README.md b/README.md
index e2e2ecc..b4cf541 100644
--- a/README.md
+++ b/README.md
@@ -8,21 +8,16 @@ The configuration is very specific to my own machines and setup, but it may be a
 
 ## Setup
 
-### NixOS
+> on macOS: install the latest unstable nix from https://github.com/numtide/nix-unstable-installer (for nix flakes),
+> and nix-darwin: https://github.com/LnL7/nix-darwin
 
-```sh
-sudo ./rebuild.sh switch
-```
-
-### macOS
-
-1. Install the latest unstable nix from https://github.com/numtide/nix-unstable-installer (to get nix flakes)
-1. Install nix-darwin: https://github.com/LnL7/nix-darwin
+To run a rebuild:
 
 ```sh
 ./rebuild.sh switch
 ```
 
+
 ## Update
 
 To update nixpkgs defined in [flake.nix](./flake.nix), run:
diff --git a/flake.lock b/flake.lock
index ae28edd..95fe87c 100644
--- a/flake.lock
+++ b/flake.lock
@@ -58,11 +58,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1634939539,
-        "narHash": "sha256-m+RC6it1doMjq5U5e1B36thzOOBc1GF4tVLK2SNMvzg=",
+        "lastModified": 1635017514,
+        "narHash": "sha256-tdV/y8nJZqKDoqFVE8ORB0drdGdSze2xeWfhWz9M3oo=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "8278c14f5f8725e1b5936d6f54e63d4626aae98c",
+        "rev": "406eeec0b98903561767ce7aca311034d298d53e",
         "type": "github"
       },
       "original": {
@@ -81,11 +81,11 @@
       },
       "locked": {
         "dir": "contrib",
-        "lastModified": 1634834187,
-        "narHash": "sha256-L/nuK/voar1fwM3tNHms953QQ80UNghqvsQootaOYQE=",
+        "lastModified": 1635040504,
+        "narHash": "sha256-EtwuXPxOnITZSyQKO4OiB4mc6GFFPYhyA+dtJIX87DQ=",
         "owner": "neovim",
         "repo": "neovim",
-        "rev": "cb15055c294e6ebb9b2a65041cbff0a79cd3e69e",
+        "rev": "6acebb8b56e21247423a5692e9ca30dff05abb63",
         "type": "github"
       },
       "original": {
@@ -102,11 +102,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1634890407,
-        "narHash": "sha256-gCkD8sj7bFS/JY+O+5JpAJXa6OBm3ZOzLgzxLuLWAKY=",
+        "lastModified": 1635063163,
+        "narHash": "sha256-RZ2xoYcAnk67UTy0isQ5+UEwQ5uBffrzU5wUKGC3saw=",
         "owner": "nix-community",
         "repo": "neovim-nightly-overlay",
-        "rev": "3ee0aa4bfa70a9990ae0ee05daec06b5e4288ddb",
+        "rev": "5ff5c9f2d167d348bd959fa4eddf37e84493a261",
         "type": "github"
       },
       "original": {
diff --git a/rebuild.sh b/rebuild.sh
index 6b9e42d..304fc75 100755
--- a/rebuild.sh
+++ b/rebuild.sh
@@ -10,7 +10,7 @@ Darwin*) machine=mac ;;
 esac
 
 if [[ "$machine" == "linux" ]]; then
-	exec nixos-rebuild -I nixos-config="machines/$(hostname)/configuration.nix" "$@" --flake '.#'
+	sudo nixos-rebuild -I nixos-config="machines/$(hostname)/configuration.nix" "$@" --flake '.#'
 elif [[ "$machine" == "mac" ]]; then
 	exec darwin-rebuild "$@" --flake .
 else