diff --git a/.github/workflows/build-pedalboard.yml b/.github/workflows/build-pedalboard.yml
index 5fda0543ec31..7c27d0531860 100644
--- a/.github/workflows/build-pedalboard.yml
+++ b/.github/workflows/build-pedalboard.yml
@@ -167,11 +167,14 @@ jobs:
           # test_type_hints needs mypy and pyright, neither of which runs on riscv64.
           # The other two modules load tests/plugins/effect/Linux/CHOWTapeModel.vst3
           # while being imported, and that VST3 bundle ships an x86_64 binary only.
+          # test_linux_wheel_cpu_compatibility (new in 0.9.26) tests upstream's x86_64
+          # AVX-boundary CI harness under scripts/, which CIBW_TEST_SOURCES doesn't stage.
           # The deselected test asserts threaded reads beat serial ones, a timing
           # race that also fails on macOS against upstream's own wheel.
           CIBW_TEST_COMMAND: >-
             python -m pytest tests --ignore=tests/test_type_hints.py
             --ignore=tests/test_external_plugins.py --ignore=tests/test_memory_leaks.py
+            --ignore=tests/test_linux_wheel_cpu_compatibility.py
             -k "not test_read_from_bytes_io_memoryview_without_gil"
 
       - name: Verify the wheel ships the extension and the bundled licences
diff --git a/docs/packages/pedalboard.yaml b/docs/packages/pedalboard.yaml
index 060936a8ea5c..1fcdee51bed6 100644
--- a/docs/packages/pedalboard.yaml
+++ b/docs/packages/pedalboard.yaml
@@ -42,3 +42,4 @@ versions:
   gpl-sources:
     filename: gpl-sources.tar
     description: gcc and the copyleft libraries bundled in the wheel
+- version: 0.9.26
diff --git a/patches/pedalboard/0.9.26/0001-cmake-don-t-assume-x86-when-the-target-isn-t-ARM.patch b/patches/pedalboard/0.9.26/0001-cmake-don-t-assume-x86-when-the-target-isn-t-ARM.patch
new file mode 100644
index 000000000000..a617b568e84c
--- /dev/null
+++ b/patches/pedalboard/0.9.26/0001-cmake-don-t-assume-x86-when-the-target-isn-t-ARM.patch
@@ -0,0 +1,48 @@
+From: RISE Project <info@riseproject.dev>
+Subject: [PATCH] cmake: don't assume x86 when the target isn't ARM
+
+The Linux branch of CMakeLists.txt has two if/else pairs that treat
+"not ARM" as "x86": one adds -mavx (or -march=native) and defines
+HAVE_AVX, the other keeps FFTW's AVX/SSE codelets and drops only the
+NEON ones. On any other architecture the build fails at
+simd-support/simd-avx.h with "compiling simd-avx.h without -mavx".
+
+Make both conditions test for x86 explicitly, so architectures without a
+vendored SIMD backend (riscv64, ppc64le, s390x) build the scalar FFTW
+codelets and get no architecture-specific compiler flags. JUCE already
+falls back to its scalar path when JUCE_USE_SIMD is 0.
+
+Upstream-Status: To upstream [not yet submitted; upstream builds no riscv64 wheels]
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index d3150d5..fb9477e 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -203,7 +203,7 @@ elseif(UNIX AND NOT APPLE)
+     # Processor-specific optimizations (x86 vs ARM)
+     if(CMAKE_SYSTEM_PROCESSOR MATCHES "arm|aarch64")
+         add_compile_definitions(HAVE_NEON=1)
+-    else()
++    elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64|AMD64|i[3-6]86")
+         # Keep distributable builds compatible with AVX-capable x86_64 CPUs.
+         # Local builds may explicitly target the build machine for extra optimization.
+         if("$ENV{USE_MARCH_NATIVE}" STREQUAL "1")
+@@ -213,6 +213,7 @@ elseif(UNIX AND NOT APPLE)
+         endif()
+         add_compile_definitions(HAVE_AVX)
+     endif()
++    # Any other architecture (riscv64, ppc64le, s390x, ...) builds without SIMD.
+     
+     # Additional Linux flags
+     list(APPEND ALL_INCLUDES "vendors/fftw3/api/" "vendors/fftw3/")
+@@ -316,8 +317,10 @@ function(collect_sources)
+         # Exclude files depending on architecture
+         if(CMAKE_SYSTEM_PROCESSOR MATCHES "arm|aarch64")
+             list(FILTER FFTW_SOURCES EXCLUDE REGEX ".*(avx|/sse).*")
+-        else()
++        elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64|AMD64|i[3-6]86")
+             list(FILTER FFTW_SOURCES EXCLUDE REGEX ".*neon.*")
++        else()
++            list(FILTER FFTW_SOURCES EXCLUDE REGEX ".*(avx|/sse|neon).*")
+         endif()
+         
+         # Exclude unused FFTW components