diff --git a/shell.nix b/shell.nix
index f5fd699..3d1aed4 100644
--- a/shell.nix
+++ b/shell.nix
@@ -4,10 +4,11 @@ in
     with pkgs;
     mkShell {
         buildInputs = [
-            pkgs.cargo
-            pkgs.rustc
-            pkgs.rustfmt
-            pkgs.rls
+            cargo
+            rustc
+            rustfmt
+            rls
+            protobuf
         ];
 
         RUST_SRC_PATH= "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
diff --git a/src/main.rs b/src/main.rs
index 6bb4ca6..5e3d6d7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,12 +3,14 @@ pub mod util;
 use util::lights::*;
 use std::sync::RwLock;
 use std::thread;
+use candela::Pixel;
 
 
 pub const LED_SIZE: usize = 450;
 
 fn main() {
-    let lock = RwLock::new([Color {r: 0, g: 0, b: 0}; LED_SIZE]);
+    let mut p: Pixel = [0, 0, 0, 0];
+    let lock = RwLock::new([p; LED_SIZE]);
     thread::spawn(move || loop {
         let lights = lock.read().unwrap();
         run_lights(&lights);