diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7a97f4a..e5953fe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,6 +19,10 @@ jobs:
         with:
           otp-version: ${{ matrix.otp }}
           elixir-version: ${{ matrix.elixir }}
+      # ort 2.0.0-rc.8 fails to build the CUDA/TensorRT variant on Rust 1.100+
+      # (new cargo build-dir layout). Remove once ort is upgraded.
+      - name: Pin Rust 1.99
+        run: rustup toolchain install 1.99.1 --profile minimal && rustup default 1.99.1
       - name: Install dependencies
         run: mix deps.get
       - name: Compile and check warnings
diff --git a/README.md b/README.md
index 53c54fc..c7e0835 100644
--- a/README.md
+++ b/README.md
@@ -62,3 +62,8 @@ end
 ```
 
 You will need [Rust](https://www.rust-lang.org/tools/install) for compilation to succeed.
+
+Builds that link ONNX Runtime dynamically, which includes the `cuda` and `tensorrt` features,
+fail to compile with Rust 1.100 and later because of the `ort` version Ortex currently uses.
+Until `ort` is upgraded, use Rust 1.99 for these builds, for example by running
+`rustup override set 1.99.1` in your project directory.