diff --git a/flow b/flow
index cbff9f8..1a2e53b 100755
--- a/flow
+++ b/flow
@@ -49,7 +49,8 @@ build() {
 
   # Create the source tarball excluding specified patterns
   info "Creating tarball: ${tarball_path}"
-  if tar --exclude='.git*' --exclude='./target' --exclude='./package' --exclude='./flows' --exclude='./flow' -czf "${tarball_path}" .; then
+  # Set COPYFILE_DISABLE=1 to prevent macOS tar from including ._ metadata files
+  if COPYFILE_DISABLE=1 tar --exclude='.git*' --exclude='./target' --exclude='./package' --exclude='./flows' --exclude='./flow' -czf "${tarball_path}" .; then
       success "Successfully created source tarball: ${tarball_path}"
   else
       error "Failed to create source tarball."