diff --git a/projects/bc-java-wycheproof/build.sh b/projects/bc-java-wycheproof/build.sh
index 1650a4986..ac28057a6 100644
--- a/projects/bc-java-wycheproof/build.sh
+++ b/projects/bc-java-wycheproof/build.sh
@@ -16,4 +16,4 @@
 ################################################################################
 
 bazel build BouncyCastleAllTests
-cp -r bazel-bin/* $OUT
+rsync -aLkR bazel-bin/* $OUT