diff --git a/README.md b/README.md
index 81c92ee..0568dc3 100644
--- a/README.md
+++ b/README.md
@@ -225,6 +225,8 @@ During the build process it will clone and build SPDK, sppark, and blst.
 ./build.sh
 ```
 
+By default it builds with support for 512MiB and 32GiB sector sizes. For other sector sizes compile with `./build.sh -r`.
+
 SPDK must be setup after every reboot:
 ```
 cd deps/spdk-v22.09
diff --git a/demos/rust/README.md b/demos/rust/README.md
index 7ab3dfa..1468011 100644
--- a/demos/rust/README.md
+++ b/demos/rust/README.md
@@ -43,24 +43,24 @@ flowchart TD;
 
 Currently configured to run 3 pipelines of 32 sectors.
 
-First make sure the supraseal-c2 library is setup in ../../c2
-
-Also make sure the core library has been built:
+Make sure the core library has been built:
 ```
-./build.sh 512MiB
-
-or for 32GiB sectors:
 ./build.sh
 ```
 
+For sector sizes other than 512MiB or 32GiB, use `./build.sh -r`.
+
+Build the Rust part:
+```
+cargo build --release
+```
+
 512MB Sectors
 ```
-cargo build --release --features=512MiB --no-default-features
-sudo ./target/release/supra-seal-demo
+sudo ./target/release/supra-seal-demo 512MiB
 ```
 
 32GB Sectors
 ```
-cargo build --release --features=32GiB --no-default-features
-sudo ./target/release/supra-seal-demo
+sudo ./target/release/supra-seal-demo 32GiB
 ```