1 files changed, 2 insertions, 4 deletions
diff --git a/src/libutil/hash.cc b/src/libutil/hash.cc
index aa50fceb9e3e..9f4afd93c2fc 100644
--- a/src/libutil/hash.cc
+++ b/src/libutil/hash.cc
@@ -1,5 +1,3 @@
-#include "config.h"
-
 #include <iostream>
 #include <cstring>
 
@@ -9,12 +7,12 @@
 #include "hash.hh"
 #include "archive.hh"
 #include "util.hh"
+#include "istringstream_nocopy.hh"
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 
-
 namespace nix {
 
 
@@ -106,7 +104,7 @@ Hash parseHash(HashType ht, const string & s)
         string s2(s, i * 2, 2);
         if (!isxdigit(s2[0]) || !isxdigit(s2[1]))
             throw BadHash(format("invalid hash ‘%1%’") % s);
-        std::istringstream str(s2);
+        istringstream_nocopy str(s2);
         int n;
         str >> std::hex >> n;
         hash.hash[i] = n;