diff --git a/pyodide_build/build_env.py b/pyodide_build/build_env.py
index 5a19619..e2f7a3d 100644
--- a/pyodide_build/build_env.py
+++ b/pyodide_build/build_env.py
@@ -21,6 +21,7 @@
 RUST_BUILD_PRELUDE = """
 rustup toolchain install ${RUST_TOOLCHAIN} && rustup default ${RUST_TOOLCHAIN}
 rustup target add wasm32-unknown-emscripten --toolchain ${RUST_TOOLCHAIN}
+rustup component add rust-src --toolchain ${RUST_TOOLCHAIN}
 """
 
 
diff --git a/pyodide_build/pywasmcross.py b/pyodide_build/pywasmcross.py
index 858b748..7e4c2a5 100755
--- a/pyodide_build/pywasmcross.py
+++ b/pyodide_build/pywasmcross.py
@@ -525,6 +525,9 @@ def handle_command_generate_args(  # noqa: C901
     elif cmd == "strip":
         line[0] = "emstrip"
         return line
+    elif cmd == "cargo":
+        line.insert(1, "-Zbuild-std")
+        return line
     else:
         return line
 
diff --git a/pyodide_build/tests/test_pywasmcross.py b/pyodide_build/tests/test_pywasmcross.py
index 23a5f77..8275817 100644
--- a/pyodide_build/tests/test_pywasmcross.py
+++ b/pyodide_build/tests/test_pywasmcross.py
@@ -262,3 +262,11 @@ def test_is_link_cmd():
     assert is_link_cmd(["test.so"])
     assert is_link_cmd(["test.so.1.2.3"])
     assert not is_link_cmd(["test", "test.a", "test.o", "test.c", "test.cpp", "test.h"])
+
+
+def test_handle_command_cargo(build_args):
+    assert handle_command_generate_args(["cargo", "build"], build_args) == [
+        "cargo",
+        "-Zbuild-std",
+        "build",
+    ]