diff --git a/scripts/ci/cuda/ci_install_dependency.sh b/scripts/ci/cuda/ci_install_dependency.sh
index bd0f6b650494..1a595fbb14fd 100755
--- a/scripts/ci/cuda/ci_install_dependency.sh
+++ b/scripts/ci/cuda/ci_install_dependency.sh
@@ -370,11 +370,22 @@ stabilize_flashinfer_jit_paths() {
 install_extra_deps() {
     if [ "$CU_MAJOR" = "13" ]; then
         MOONCAKE_PKG="mooncake-transfer-engine-cuda13==0.3.10.post2"
+        MOONCAKE_STALE_PKG="mooncake-transfer-engine"
         EXTRA_NVIDIA_SPECS="nvidia-cuda-nvrtc"
     else
         MOONCAKE_PKG="mooncake-transfer-engine==0.3.10.post2"
+        MOONCAKE_STALE_PKG="mooncake-transfer-engine-cuda13"
         EXTRA_NVIDIA_SPECS="nvidia-cuda-nvrtc-cu12"
     fi
+    # Both variants own the same mooncake/ package files and bin/ scripts
+    # (mooncake_master, etc.). Uninstalling the stale variant deletes shared
+    # files that the live variant's RECORD still references, so we force a
+    # reinstall to restore them — pip would otherwise see "already satisfied"
+    # and skip.
+    if pip show ${MOONCAKE_STALE_PKG} >/dev/null 2>&1; then
+        $PIP_UNINSTALL_CMD ${MOONCAKE_STALE_PKG} $PIP_UNINSTALL_SUFFIX || true
+        $PIP_CMD install ${MOONCAKE_PKG} --force-reinstall --no-deps $PIP_INSTALL_SUFFIX
+    fi
     $PIP_CMD install ${MOONCAKE_PKG} ${EXTRA_NVIDIA_SPECS} py-spy scipy huggingface_hub[hf_xet] pytest $PIP_INSTALL_SUFFIX
 
     if [ "$IS_BLACKWELL" != "1" ]; then