1 files changed, 16 insertions, 0 deletions
diff --git a/nix/libstore/optimise-store.cc b/nix/libstore/optimise-store.cc
index 67ee94a4bd..8ba9d1a263 100644
--- a/nix/libstore/optimise-store.cc
+++ b/nix/libstore/optimise-store.cc
@@ -225,6 +225,22 @@ void LocalStore::optimiseStore(OptimiseStats & stats)
     }
 }
 
+static string showBytes(unsigned long long bytes)
+{
+    return (format("%.2f MiB") % (bytes / (1024.0 * 1024.0))).str();
+}
+
+void LocalStore::optimiseStore()
+{
+    OptimiseStats stats;
+
+    optimiseStore(stats);
+
+    printMsg(lvlError,
+        format("%1% freed by hard-linking %2% files")
+        % showBytes(stats.bytesFreed)
+        % stats.filesLinked);
+}
 
 void LocalStore::optimisePath(const Path & path)
 {