diff --git a/world/src/lib.rs b/world/src/lib.rs
index 65a0283e75..5a58627c9c 100644
--- a/world/src/lib.rs
+++ b/world/src/lib.rs
@@ -1,6 +1,5 @@
 #![deny(unsafe_code)]
 #![feature(
-    box_syntax,
     const_generics,
     euclidean_division,
     bind_by_move_pattern_guards,
diff --git a/world/src/sim/util.rs b/world/src/sim/util.rs
index 2c90a2e659..4e27ee20a4 100644
--- a/world/src/sim/util.rs
+++ b/world/src/sim/util.rs
@@ -92,7 +92,9 @@ pub fn cdf_irwin_hall<const N: usize>(weights: &[f32; N], samples: [f32; N]) ->
 /// index (i.e. its position in a sorted list of value returned by the noise function applied to
 /// every chunk in the game).  Second component is the cached value of the noise function that
 /// generated the index.
-pub type InverseCdf = Box<[(f32, f32); WORLD_SIZE.x * WORLD_SIZE.y]>;
+///
+/// NOTE: Length should always be WORLD_SIZE.x * WORLD_SIZE.y.
+pub type InverseCdf = Box<[(f32, f32)]>;
 
 /// Computes the position Vec2 of a SimChunk from an index, where the index was generated by
 /// uniform_noise.
@@ -156,7 +158,7 @@ pub fn uniform_noise(f: impl Fn(usize, Vec2<f64>) -> f32) -> InverseCdf {
     // NOTE: Currently there doesn't seem to be a way to create a large fixed-size
     // array on the heap without overflowing the stack unless you use placement box (at least on
     // debug mode).  So I want to keep using this until a better alternative is made available.
-    let mut uniform_noise = box [(0.0, 0.0); WORLD_SIZE.x * WORLD_SIZE.y];
+    let mut uniform_noise = vec![(0.0, 0.0); WORLD_SIZE.x * WORLD_SIZE.y].into_boxed_slice();
     let total = (WORLD_SIZE.x * WORLD_SIZE.y) as f32;
     for (noise_idx, (chunk_idx, noise_val)) in noise.into_iter().enumerate() {
         uniform_noise[chunk_idx] = ((1 + noise_idx) as f32 / total, noise_val);