diff --git a/docs/packages/lefthook.yaml b/docs/packages/lefthook.yaml
index f1bb0b2724e..de9c8b4ba5f 100644
--- a/docs/packages/lefthook.yaml
+++ b/docs/packages/lefthook.yaml
@@ -23,3 +23,4 @@ versions:
   - filename: lefthook-2.1.14-py3-none-manylinux_2_39_riscv64.whl
     sha256: a029fb0ff697f8535c65eb90419749bae14ece18da35e73d6ea1c08d9991bd15
     requires-python: '>=3.6'
+- version: 2.1.15
diff --git a/patches/lefthook/2.1.15/0001-add-riscv64-to-the-PyPI-wheel-platform-tag-table.patch b/patches/lefthook/2.1.15/0001-add-riscv64-to-the-PyPI-wheel-platform-tag-table.patch
new file mode 100644
index 00000000000..21013d7c908
--- /dev/null
+++ b/patches/lefthook/2.1.15/0001-add-riscv64-to-the-PyPI-wheel-platform-tag-table.patch
@@ -0,0 +1,43 @@
+From 57fc962c40b51418965084d5e22e31a5abcd1268 Mon Sep 17 00:00:00 2001
+From: Ludovic Henry <git@ludovic.dev>
+Date: Thu, 24 Sep 2026 06:45:00 +0000
+Subject: [PATCH] add riscv64 to the PyPI wheel platform-tag table
+
+Upstream-Status: To upstream [not submitted yet: lefthook has no riscv64 CI runner, so a drive-by PR could not be exercised by upstream's own release workflow; needs a maintainer discussion first]
+
+hatch_build.py's PEP425_TAGS dict maps (platform, arch) to the wheel's
+PEP 425 tag, keyed off LEFTHOOK_TARGET_PLATFORM/LEFTHOOK_TARGET_ARCH (or
+the host's own sys.platform/platform.machine() when unset). It only
+knows the six platforms upstream's own publish.raku loop builds for, so
+building with LEFTHOOK_TARGET_PLATFORM=linux LEFTHOOK_TARGET_ARCH=riscv64
+falls through to "no PEP425 tag" and produces a universal py3-none-any
+wheel that would wrongly claim to work on every platform while bundling
+a riscv64-only binary.
+
+Add ("linux", "riscv64") -> "py3-none-manylinux_2_39_riscv64", matching
+the manylinux_riscv64 image this project's own riscv64 wheel builds run
+in. ARCH_MAPPING and main.py's copy of it need no change: platform.machine()
+already reports "riscv64" verbatim on that architecture, which is also
+the directory name the binary is shipped under (lefthook/bin/lefthook-linux-riscv64/).
+Existing platforms resolve unchanged.
+
+Signed-off-by: Ludovic Henry <git@ludovic.dev>
+---
+ packaging/registries/pypi/hatch_build.py | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/packaging/registries/pypi/hatch_build.py b/packaging/registries/pypi/hatch_build.py
+index a296e30..5e060fd 100644
+--- a/packaging/registries/pypi/hatch_build.py
++++ b/packaging/registries/pypi/hatch_build.py
+@@ -30,6 +30,7 @@ ARCH_MAPPING = {
+ PEP425_TAGS = {
+     ("linux", "x86_64"): "py3-none-manylinux_2_17_x86_64",
+     ("linux", "arm64"): "py3-none-manylinux_2_17_aarch64",
++    ("linux", "riscv64"): "py3-none-manylinux_2_39_riscv64",
+     ("darwin", "x86_64"): "py3-none-macosx_10_15_x86_64",
+     ("darwin", "arm64"): "py3-none-macosx_11_0_arm64",
+     ("windows", "x86_64"): "py3-none-win_amd64",
+-- 
+2.43.0
+