1 files changed, 2 insertions, 2 deletions
diff --git a/nix/libutil/hash.cc b/nix/libutil/hash.cc
index 9b83ffcdd9..3cb4d05318 100644
--- a/nix/libutil/hash.cc
+++ b/nix/libutil/hash.cc
@@ -64,12 +64,12 @@ const string base16Chars = "0123456789abcdef";
 
 string printHash(const Hash & hash)
 {
-    char buf[hash.hashSize * 2];
+    std::vector<char> buf(hash.hashSize * 2);
     for (unsigned int i = 0; i < hash.hashSize; i++) {
         buf[i * 2] = base16Chars[hash.hash[i] >> 4];
         buf[i * 2 + 1] = base16Chars[hash.hash[i] & 0x0f];
     }
-    return string(buf, hash.hashSize * 2);
+    return string(buf.begin(), buf.end());
 }