diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/env/sys-fs/zfs-kmod b/sdk_container/src/third_party/coreos-overlay/coreos/config/env/sys-fs/zfs-kmod
index 55536d82a8..d9059b9386 100644
--- a/sdk_container/src/third_party/coreos-overlay/coreos/config/env/sys-fs/zfs-kmod
+++ b/sdk_container/src/third_party/coreos-overlay/coreos/config/env/sys-fs/zfs-kmod
@@ -1,2 +1,9 @@
 : ${MODULES_ROOT:=$(echo ${SYSROOT}/lib/modules/*)}
 KERNEL_DIR="${MODULES_ROOT}/build"
+
+# Necessary to prevent KV_FULL & KV_OUT_DIR from being unset
+# when building Kernel modules for sysext. See also eclass/linux-info.eclass.
+cros_pre_pkg_setup_kernel_version() {
+    LINUX_INFO_BINARY_RESET=1
+    get_version
+}