diff --git a/Makefile.envs b/Makefile.envs
index e9b1e96fd8c..d5861fdc120 100644
--- a/Makefile.envs
+++ b/Makefile.envs
@@ -11,8 +11,8 @@ export PYTHON_ARCHIVE_SHA256=d01ec6a33bc10009b09c17da95cc2759af5a580a7316b3a446e
 # to your fork to test the changes are working as expected.
 
 # v0.27.3
-export PYODIDE_BUILD_COMMIT=fac0109aa2acf14469320b049d710dd42639bf94
-export PYODIDE_BUILD_REPO=https://github.com/pyodide/pyodide-build
+export PYODIDE_BUILD_COMMIT=e6928ea61533989063f4ca97138a5dc684144b3d
+export PYODIDE_BUILD_REPO=https://github.com/hoodmane/pyodide-build
 
 ifdef CPYTHON_DEBUG
 	export CPYTHON_ABI_FLAGS=d
diff --git a/packages/rust-abi-test/meta.yaml b/packages/rust-abi-test/meta.yaml
new file mode 100644
index 00000000000..6448c8b259c
--- /dev/null
+++ b/packages/rust-abi-test/meta.yaml
@@ -0,0 +1,10 @@
+package:
+  name: rust-abi-test
+  version: "1.0"
+source:
+  path: src
+requirements:
+  executable:
+    - rustup
+about:
+  license: MPL-2.0
diff --git a/packages/rust-abi-test/src/Cargo.toml b/packages/rust-abi-test/src/Cargo.toml
new file mode 100644
index 00000000000..1bb5af63722
--- /dev/null
+++ b/packages/rust-abi-test/src/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "rust-abi-test"
+version = "0.1.0"
+edition = "2018"
+publish = false
+
+[dependencies]
+pyo3 = { version = "0.22.3" }
+
+[features]
+extension-module = ["pyo3/extension-module"]
+default = ["extension-module"]
+
+[lib]
+crate-type = ["cdylib"]
+
+[profile.release]
+lto = "thin"
+overflow-checks = true
diff --git a/packages/rust-abi-test/src/pyproject.toml b/packages/rust-abi-test/src/pyproject.toml
new file mode 100644
index 00000000000..8619d8784c5
--- /dev/null
+++ b/packages/rust-abi-test/src/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools", "wheel", "setuptools-rust"]
+build-backend = "setuptools.build_meta"
diff --git a/packages/rust-abi-test/src/setup.py b/packages/rust-abi-test/src/setup.py
new file mode 100644
index 00000000000..3392ca2d02a
--- /dev/null
+++ b/packages/rust-abi-test/src/setup.py
@@ -0,0 +1,12 @@
+from setuptools import setup
+from setuptools_rust import Binding, RustExtension
+
+setup(
+    name="rust_abi_test",
+    version="1.0",
+    rust_extensions=[
+        RustExtension("rust_abi_test", "Cargo.toml", binding=Binding.PyO3)
+    ],
+    # rust extensions are not zip safe, just like C-extensions.
+    zip_safe=False,
+)
diff --git a/packages/rust-abi-test/src/src/lib.rs b/packages/rust-abi-test/src/src/lib.rs
new file mode 100644
index 00000000000..451e44cd8a8
--- /dev/null
+++ b/packages/rust-abi-test/src/src/lib.rs
@@ -0,0 +1,17 @@
+use std::fs;
+use pyo3::prelude::*;
+
+
+#[pyfunction]
+fn get_file_length(data: &str) ->  PyResult<u64> {
+    let metadata = fs::metadata(data)?;
+    Ok(metadata.len())
+}
+
+
+
+#[pymodule]
+fn rust_abi_test(m: &Bound<'_, PyModule>) -> pyo3::PyResult<()> {
+    m.add_function(wrap_pyfunction!(get_file_length, m)?)?;
+    Ok(())
+}
diff --git a/packages/rust-abi-test/test_rust_abi.py b/packages/rust-abi-test/test_rust_abi.py
new file mode 100644
index 00000000000..60b35be2eca
--- /dev/null
+++ b/packages/rust-abi-test/test_rust_abi.py
@@ -0,0 +1,11 @@
+from pytest_pyodide import run_in_pyodide
+
+@run_in_pyodide(packages=["rust-abi-test"])
+def test_rust_abi(selenium):
+    from pathlib import Path
+    from rust_abi_test import get_file_length
+
+    contents = "this is the contents of the file\n" * 4
+    Path("/test.txt").write_text(contents)
+    assert get_file_length("/test.txt") == len(contents)
+    
\ No newline at end of file
diff --git a/packages/rust-panic-test/src/Cargo.lock b/packages/rust-panic-test/src/Cargo.lock
deleted file mode 100644
index e7cecae9fc8..00000000000
--- a/packages/rust-panic-test/src/Cargo.lock
+++ /dev/null
@@ -1,7 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-version = 3
-
-[[package]]
-name = "hello-world"
-version = "0.1.0"