fixup! fixup! Build libtcl

Author: geofft

cpython-unix/build-cpython.sh

@@ -730,7 +730,7 @@ if [ "${PYBUILD_SHARED}" = "1" ]; then
         # dependencies, but at some point we will want to run this for
         # them too.
         for module in ${ROOT}/out/python/install/lib/python*/lib-dynload/*.so; do
-            install_name_tool -rpath @loader_path/../.. "$module"
+            install_name_tool -add_rpath @loader_path/../.. "$module"
         done
     else # (not macos)
         LIBPYTHON_SHARED_LIBRARY_BASENAME=libpython${PYTHON_MAJMIN_VERSION}${PYTHON_BINARY_SUFFIX}.so.1.0