diff --git a/.github/workflows/build-databricks-zerobus-ingest-sdk.yml b/.github/workflows/build-databricks-zerobus-ingest-sdk.yml
index 26524673f95..bc83f8f18de 100644
--- a/.github/workflows/build-databricks-zerobus-ingest-sdk.yml
+++ b/.github/workflows/build-databricks-zerobus-ingest-sdk.yml
@@ -99,7 +99,8 @@ jobs:
           CIBW_ENVIRONMENT_LINUX: >-
             PATH="$PATH:$HOME/.cargo/bin"
             PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
-          CIBW_TEST_REQUIRES: pytest pytest-asyncio>=0.21,<1.0 pyarrow
+          # Latest pyarrow with riscv64 wheels on pypi.riseproject.dev; newer ones are sdist-only and need Arrow C++.
+          CIBW_TEST_REQUIRES: pytest pytest-asyncio>=0.21,<1.0 pyarrow==25.0.1
           CIBW_TEST_SOURCES: python/tests
           CIBW_TEST_COMMAND: >-
             python -c "import zerobus._zerobus_core as m; assert m.__file__.endswith('.so'), m.__file__" &&
diff --git a/docs/packages/databricks-zerobus-ingest-sdk.yaml b/docs/packages/databricks-zerobus-ingest-sdk.yaml
index d360d806d52..4e3e7e5d848 100644
--- a/docs/packages/databricks-zerobus-ingest-sdk.yaml
+++ b/docs/packages/databricks-zerobus-ingest-sdk.yaml
@@ -26,3 +26,4 @@ versions:
   - filename: databricks_zerobus_ingest_sdk-1.9.0-cp39-abi3-manylinux_2_34_riscv64.manylinux_2_39_riscv64.whl
     sha256: 1c751fde320db55604ec44dc9aa6ea8a55850b95e21439f41e8ad7e6ce84014f
     requires-python: '>=3.9, <3.15'
+- version: 1.10.0
diff --git a/patches/databricks-zerobus-ingest-sdk/1.10.0/0001-sdk-fall-back-to-prost-build-s-own-protoc-lookup-on-.patch b/patches/databricks-zerobus-ingest-sdk/1.10.0/0001-sdk-fall-back-to-prost-build-s-own-protoc-lookup-on-.patch
new file mode 100644
index 00000000000..3cec621fcba
--- /dev/null
+++ b/patches/databricks-zerobus-ingest-sdk/1.10.0/0001-sdk-fall-back-to-prost-build-s-own-protoc-lookup-on-.patch
@@ -0,0 +1,39 @@
+From 87f2462219287d68f873d7b3d12b5cd2bce0e47a Mon Sep 17 00:00:00 2001
+From: Ludovic Henry <git@ludovic.dev>
+Date: Mon, 28 Sep 2026 12:50:24 +0000
+Subject: [PATCH] sdk: fall back to prost-build's own protoc lookup on riscv64
+
+Upstream-Status: Inappropriate [protoc-bin-vendored ships no riscv64 binary; prost-build already honours $PROTOC and falls back to protoc on PATH, so only overriding PROTOC when the vendored lookup succeeds is the whole fix]
+
+protoc_bin_vendored::protoc_bin_path() returns Err on any platform outside
+its small enum of prebuilt targets (x86, x86_64, aarch64, ppc64le, s390x,
+macOS, Windows), and build.rs unwrap()ed it, panicking before prost-build
+ever got a chance to look for a protoc on PATH or via $PROTOC. Only
+setting PROTOC when the vendored lookup succeeds restores that fallback,
+documented in prost-build's "Sourcing protoc" section.
+
+Signed-off-by: Ludovic Henry <git@ludovic.dev>
+---
+ rust/sdk/build.rs | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/rust/sdk/build.rs b/rust/sdk/build.rs
+index 3e080ec..c75eaa9 100644
+--- a/rust/sdk/build.rs
++++ b/rust/sdk/build.rs
+@@ -5,7 +5,11 @@ use std::env;
+ mod zeroparser_proto_build;
+ 
+ fn main() {
+-    env::set_var("PROTOC", protoc_bin_vendored::protoc_bin_path().unwrap());
++    // protoc-bin-vendored ships no riscv64 binary; falling through leaves
++    // prost_build's own PROTOC-env/PATH lookup in charge.
++    if let Ok(protoc) = protoc_bin_vendored::protoc_bin_path() {
++        env::set_var("PROTOC", protoc);
++    }
+     tonic_prost_build::compile_protos("zerobus_service.proto")
+         .unwrap_or_else(|e| panic!("Failed to compile protos {:?}", e));
+ 
+-- 
+2.43.0
+