diff --git a/.github/workflows/build_kernels.yaml b/.github/workflows/build_kernels.yaml
index 100f4cc..5a24d62 100644
--- a/.github/workflows/build_kernels.yaml
+++ b/.github/workflows/build_kernels.yaml
@@ -2,7 +2,7 @@ name: Build and Release Kernels
 
 # Builds every wheel prime-rl (and other consumers) pin via `[tool.uv.sources]`:
 # prime-kernels (this repo's own kernels.toml-declared extensions), deep-ep and
-# deep-gemm (from their pinned deepseek-ai revs), and our torchao (from the pytorch/ao
+# deep-gemm (from their pinned upstream revs), and our torchao (from the pytorch/ao
 # rev the MXFP8 training path requires). This repo is the single build+release site for
 # all four — prime-rl only consumes the resulting release, it does not build anything
 # itself (see scripts/install_ep_kernels.sh, scripts/install_deep_gemm.sh,
@@ -100,9 +100,11 @@ jobs:
       # git, curl, gcc/g++/make and cmake/ninja already ship in this image (via
       # /opt/conda and gcc-toolset-13). libibverbs-devel/librdmacm-devel: NVSHMEM's
       # IBGDA transport headers (infiniband/mlx5dv.h), compile-time only — deep-ep
-      # dlopens the real thing at runtime. `xz` unpacks the NVSHMEM archive.
+      # dlopens the real thing at runtime. elfutils-devel: DeepJIT's `elfutils/libdwfl.h`
+      # (deep-gemm's stack traces), also compile-time only and dlopened at runtime. `xz`
+      # unpacks the NVSHMEM archive.
       - name: Install build tooling
-        run: dnf install -y --setopt=install_weak_deps=False ca-certificates xz libibverbs-devel librdmacm-devel
+        run: dnf install -y --setopt=install_weak_deps=False ca-certificates xz libibverbs-devel librdmacm-devel elfutils-devel
 
       - name: Checkout
         uses: actions/checkout@v5
diff --git a/scripts/install_deep_gemm.sh b/scripts/install_deep_gemm.sh
index 3783b91..cab73cb 100755
--- a/scripts/install_deep_gemm.sh
+++ b/scripts/install_deep_gemm.sh
@@ -10,20 +10,25 @@
 #   bash scripts/install_deep_gemm.sh --wheel-dir dist
 #
 # Options:
-#   --ref REF        DeepGEMM commit hash (default: 891d57b)
+#   --repo URL       DeepGEMM git repository (default: vllm-project/DeepGEMM)
+#   --ref REF        DeepGEMM commit hash (default: e1f418c)
 #   --wheel-dir DIR  Output wheel to DIR (default: ./dist)
+#
+# The default is vLLM's DeepGEMM fork at the commit vLLM 0.31.0 vendors (2.8.0). vLLM imports
+# an installed `deep_gemm` ahead of its vendored copy, so this keeps both on the same kernels.
 
 set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 REPO_ROOT="$(dirname "$SCRIPT_DIR")"
 
-DEEPGEMM_GIT_REPO="https://github.com/deepseek-ai/DeepGEMM.git"
-DEEPGEMM_GIT_REF="891d57b4db1071624b5c8fa0d1e51cb317fa709f"
+DEEPGEMM_GIT_REPO="https://github.com/vllm-project/DeepGEMM.git"
+DEEPGEMM_GIT_REF="e1f418c2a4f20818221f6b0e578b4c2f634d4c3f"
 WHEEL_DIR="$REPO_ROOT/dist"
 
 while [[ $# -gt 0 ]]; do
     case $1 in
+        --repo)      DEEPGEMM_GIT_REPO="$2"; shift 2 ;;
         --ref)       DEEPGEMM_GIT_REF="$2"; shift 2 ;;
         --wheel-dir) WHEEL_DIR="$2";        shift 2 ;;
         *) echo "Unknown argument: $1" >&2; exit 1 ;;