+#define PSEUDOHEADER_PREFIX "Nmh-"
+#define ATTACH_FIELD PSEUDOHEADER_PREFIX "Attach"
+#define ATTACH_FIELD_ALT "Attach"
+#define MHBUILD_FILE_PSEUDOHEADER PSEUDOHEADER_PREFIX "mhbuild-file-"
+#define MHBUILD_ARGS_PSEUDOHEADER PSEUDOHEADER_PREFIX "mhbuild-args-"