Fix build on gcc 7

Fixes #1738.
2017-12-16 00:48:09 +01:00 · 2017-12-16 00:48:09 +01:00 · 8efe937a35
commit 8efe937a35
parent 1dffbff57d
1 changed files with 2 additions and 0 deletions
--- 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 {