1 files changed, 9 insertions, 3 deletions
diff --git a/src/libutil/rust-ffi.cc b/src/libutil/rust-ffi.cc
index 931d29542..accc5e22b 100644
--- a/src/libutil/rust-ffi.cc
+++ b/src/libutil/rust-ffi.cc
@@ -1,12 +1,18 @@
 #include "logging.hh"
 #include "rust-ffi.hh"
 
-namespace nix {
-
 extern "C" std::exception_ptr * make_error(rust::StringSlice s)
 {
     // FIXME: leak
-    return new std::exception_ptr(std::make_exception_ptr(Error(std::string(s.ptr, s.size))));
+    return new std::exception_ptr(std::make_exception_ptr(nix::Error(std::string(s.ptr, s.size))));
+}
+
+namespace rust {
+
+std::ostream & operator << (std::ostream & str, const String & s)
+{
+    str << (std::string_view) s;
+    return str;
 }
 
 }