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-rw-r--r--src/nix-store/nix-store.cc4
-rw-r--r--src/nix-store/serve-protocol.hh2
2 files changed, 4 insertions, 2 deletions
diff --git a/src/nix-store/nix-store.cc b/src/nix-store/nix-store.cc
index d541b7b7d00a..89518bfb1bd3 100644
--- a/src/nix-store/nix-store.cc
+++ b/src/nix-store/nix-store.cc
@@ -853,7 +853,7 @@ static void opServe(Strings opFlags, Strings opArgs)
     if (magic != SERVE_MAGIC_1) throw Error("protocol mismatch");
     out << SERVE_MAGIC_2 << SERVE_PROTOCOL_VERSION;
     out.flush();
-    readInt(in); // Client version, unused for now
+    unsigned int clientVersion = readInt(in);
 
     auto getBuildSettings = [&]() {
         // FIXME: changing options here doesn't work if we're
@@ -863,6 +863,8 @@ static void opServe(Strings opFlags, Strings opArgs)
         settings.useSubstitutes = false;
         settings.maxSilentTime = readInt(in);
         settings.buildTimeout = readInt(in);
+        if (GET_PROTOCOL_MINOR(clientVersion) >= 2)
+            settings.maxLogSize = readInt(in);
     };
 
     while (true) {
diff --git a/src/nix-store/serve-protocol.hh b/src/nix-store/serve-protocol.hh
index f7f151d4603f..c4e2a370300b 100644
--- a/src/nix-store/serve-protocol.hh
+++ b/src/nix-store/serve-protocol.hh
@@ -5,7 +5,7 @@ namespace nix {
 #define SERVE_MAGIC_1 0x390c9deb
 #define SERVE_MAGIC_2 0x5452eecb
 
-#define SERVE_PROTOCOL_VERSION 0x201
+#define SERVE_PROTOCOL_VERSION 0x202
 #define GET_PROTOCOL_MAJOR(x) ((x) & 0xff00)
 #define GET_PROTOCOL_MINOR(x) ((x) & 0x00ff)