Fix building on clang

https://hydra.nixos.org/build/62945761
NixOS · Oct 25, 2017 · 9971d87 · 9971d87
1 parent 82327e3
commit 9971d87
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
@@ -2400,10 +2400,10 @@ void DerivationGoal::writeStructuredAttrs()
             }
 
             if (value.is_null())
-                return "''";
+                return std::string("''");
 
             if (value.is_boolean())
-                return value.get<bool>() ? "1" : "";
+                return value.get<bool>() ? std::string("1") : std::string("");
 
             return {};
         };