diff --git a/scripts/build-llama-rdna4.sh b/scripts/build-llama-rdna4.sh
index 0bb1203..59c7455 100755
--- a/scripts/build-llama-rdna4.sh
+++ b/scripts/build-llama-rdna4.sh
@@ -116,10 +116,23 @@ if command -v patchelf >/dev/null; then
           "$ROCM_LOCAL_PATH/lib/llvm/lib"/libomp.so* \
           "$ROCM_LOCAL_PATH/lib/llvm/lib"/libomptarget.so* "$LIB_DIR/" 2>/dev/null || true
     cp -v "$ROCM_LOCAL_PATH/lib/rocm_sysdeps/lib"/librocm_sysdeps_*.so* "$LIB_DIR/" 2>/dev/null || true
-    [[ -d "$ROCM_LOCAL_PATH/lib/rocblas/library" ]] && \
-        cp -r "$ROCM_LOCAL_PATH/lib/rocblas/library" "$LIB_DIR/rocblas/" 2>/dev/null || true
-    [[ -d "$ROCM_LOCAL_PATH/lib/hipblaslt/library" ]] && \
-        cp -r "$ROCM_LOCAL_PATH/lib/hipblaslt/library" "$LIB_DIR/hipblaslt/" 2>/dev/null || true
+    # rocBLAS and hipBLASLt look for their device code at a FIXED depth under
+    # the binary's lib dir: $ORIGIN/../lib/rocblas/library and
+    # $ORIGIN/../lib/hipblaslt/library/<arch>. `cp -r SRC DST/` with a missing
+    # DST creates DST as a copy of SRC and flattens the source by one level, so
+    # the engine loads, serves nothing, and dies on the FIRST request with
+    #   rocBLAS error: Cannot read .../lib/rocblas/library/TensileLibrary.dat:
+    #   No such file or directory for GPU arch : gfx1201
+    # (measured 2026-09-16, after a build that looked perfectly healthy).
+    # Declare the destination, then copy the contents into it.
+    if [[ -d "$ROCM_LOCAL_PATH/lib/rocblas/library" ]]; then
+        mkdir -p "$LIB_DIR/rocblas/library"
+        cp -r "$ROCM_LOCAL_PATH/lib/rocblas/library/." "$LIB_DIR/rocblas/library/"
+    fi
+    if [[ -d "$ROCM_LOCAL_PATH/lib/hipblaslt/library" ]]; then
+        mkdir -p "$LIB_DIR/hipblaslt/library"
+        cp -r "$ROCM_LOCAL_PATH/lib/hipblaslt/library/." "$LIB_DIR/hipblaslt/library/"
+    fi
     for bin in "$BUILD_DIR"/bin/llama-*; do
         [[ -f "$bin" ]] && patchelf --set-rpath '$ORIGIN/../lib' "$bin"
     done