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-rw-r--r--src/libmain/shared.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index d0c75a82a..ef4ea3706 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -17,6 +17,8 @@
#include <signal.h>
#include <spawn.h>
+extern char * * environ;
+
namespace nix {