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-rw-r--r--src/libutil/util.hh4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/libutil/util.hh b/src/libutil/util.hh
index 9f239bff371a..54936a5cb10b 100644
--- a/src/libutil/util.hh
+++ b/src/libutil/util.hh
@@ -30,6 +30,10 @@ struct Sink;
 struct Source;
 
 
+/* The system for which Nix is compiled. */
+extern const std::string nativeSystem;
+
+
 /* Return an environment variable. */
 string getEnv(const string & key, const string & def = "");