Fix build on gcc 7

Fixes #1738.
NixOS · Dec 15, 2017 · 8efe937 · 8efe937
1 parent 1dffbff
commit 8efe937
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/libstore/nar-accessor.hh b/src/libstore/nar-accessor.hh
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <functional>
+
 #include "fs-accessor.hh"
 
 namespace nix {