diff --git a/build_tarballs.jl b/build_tarballs.jl
index 53bcf70..df5a754 100644
--- a/build_tarballs.jl
+++ b/build_tarballs.jl
@@ -148,6 +148,10 @@ fi
 # We want a build with no bindings
 CMAKE_FLAGS="${CMAKE_FLAGS} -DLLVM_BINDINGS_LIST=\"\" "
 
+# Turn off ZLIB and XML2
+CMAKE_FLAGS="${CMAKE_FLAGS} -DLLVM_ENABLE_ZLIB=OFF"
+CMAKE_FLAGS="${CMAKE_FLAGS} -DLLVM_ENABLE_XML2=OFF"
+
 # Disable useless things like docs, terminfo, etc....
 CMAKE_FLAGS="${CMAKE_FLAGS} -DLLVM_INCLUDE_DOCS=Off"
 CMAKE_FLAGS="${CMAKE_FLAGS} -DLLVM_ENABLE_TERMINFO=Off"