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-rw-r--r--src/libstore/store-api.hh2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index 65c4cdc97fc4..8c618bf3e771 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -253,6 +253,8 @@ public:
     virtual void querySubstitutablePathInfos(const PathSet & paths,
         SubstitutablePathInfos & infos) = 0;
 
+    virtual bool wantMassQuery() { return false; }
+
     /* Import a path into the store. */
     virtual void addToStore(const ValidPathInfo & info, const std::string & nar,
         bool repair = false) = 0;