diff --git a/manylinux-x64/Dockerfile.in b/manylinux-x64/Dockerfile.in
index b7254fa..87db074 100644
--- a/manylinux-x64/Dockerfile.in
+++ b/manylinux-x64/Dockerfile.in
@@ -25,4 +25,5 @@ COPY linux-x64/${CROSS_TRIPLE}-noop.sh /usr/bin/${CROSS_TRIPLE}-noop
 
 COPY manylinux-x64/Toolchain.cmake ${CROSS_ROOT}/../lib/
 ENV CMAKE_TOOLCHAIN_FILE ${CROSS_ROOT}/../lib/Toolchain.cmake
+ENV DOCKCROSS_PASS_CMAKE_TOOLCHAIN_FILE 0
 ENV DEFAULT_DOCKCROSS_IMAGE dockcross/manylinux-x64