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authorEelco Dolstra <e.dolstra@tudelft.nl>2008-08-14T13·02+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2008-08-14T13·02+0000
commitdb4f4a842515392a6b40f5c86b2ef885c1278451 (patch)
tree1a4cf69719915670d17ccb742655397f4b427390 /src/libstore/remote-store.cc
parent1b962fc7206bf3134b2a2097d3db0ee6d2863c47 (diff)
* Backward compatibility check to prevent nixos-rebuild from barfing
  when upgrading Nix.

Diffstat (limited to 'src/libstore/remote-store.cc')
-rw-r--r--src/libstore/remote-store.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc
index bc04c8adb9ab..66e5256422b6 100644
--- a/src/libstore/remote-store.cc
+++ b/src/libstore/remote-store.cc
@@ -216,6 +216,7 @@ bool RemoteStore::hasSubstitutes(const Path & path)
 bool RemoteStore::querySubstitutablePathInfo(const Path & path,
     SubstitutablePathInfo & info)
 {
+    if (GET_PROTOCOL_MINOR(daemonVersion) < 3) return false;
     writeInt(wopQuerySubstitutablePathInfo, to);
     writeString(path, to);
     processStderr();