diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/env/net-libs/libtirpc b/sdk_container/src/third_party/coreos-overlay/coreos/config/env/net-libs/libtirpc
new file mode 100644
index 0000000000..bad72543f7
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/coreos/config/env/net-libs/libtirpc
@@ -0,0 +1,10 @@
+# Set netconfig path to /usr so NFS works in PXE/ISO-booted systems.
+
+cros_post_src_prepare_libtirpc_flatcar_modifications() {
+    sed -i -e "s,/etc,/usr/share/tirpc," "${S}/tirpc/netconfig.h" || die
+}
+
+cros_post_src_install_libtirpc_flatcar_modifications() {
+    mkdir -p "${ED}/usr/share/tirpc"
+    mv "${ED}/etc/netconfig" "${ED}/usr/share/tirpc/netconfig"
+}