diff --git a/rtiow/build_all_features.sh b/rtiow/build_all_features.sh
new file mode 100755
index 0000000..a7f9d45
--- /dev/null
+++ b/rtiow/build_all_features.sh
@@ -0,0 +1,5 @@
+export RUSTFLAGS="-D warnings"
+cargo watch -x 'build' \
+  -x 'build --features=prom' \
+  -x 'build --features=profile' \
+  -x 'build --features=prom,profile'
diff --git a/rtiow/src/bin/noise_explorer.rs b/rtiow/src/bin/noise_explorer.rs
index 85f339d..9d8a638 100644
--- a/rtiow/src/bin/noise_explorer.rs
+++ b/rtiow/src/bin/noise_explorer.rs
@@ -153,7 +153,7 @@ fn render_noise(noise_params: NoiseParams) -> image::GrayImage {
     const SEED: [u8; 16] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
     let rng: &mut XorShiftRng = &mut SeedableRng::from_seed(SEED);
     let mut img = image::GrayImage::new(noise_params.width, noise_params.height);
-    let tex: NoiseTexture<Box<noise::NoiseSource>> = match noise_params.noise_source {
+    let tex: NoiseTexture<Box<dyn noise::NoiseSource>> = match noise_params.noise_source {
         NoiseSource::Perlin => {
             NoiseTexture::new(Box::new(Perlin::new(rng)), noise_params.noise_type)
         }