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-rw-r--r--src/libstore/optimise-store.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libstore/optimise-store.cc b/src/libstore/optimise-store.cc
index 486538bd29f6..2c3f59a72428 100644
--- a/src/libstore/optimise-store.cc
+++ b/src/libstore/optimise-store.cc
@@ -51,6 +51,8 @@ struct MakeImmutable
 
 void LocalStore::optimisePath_(OptimiseStats & stats, const Path & path)
 {
+    checkInterrupt();
+    
     struct stat st;
     if (lstat(path.c_str(), &st))
 	throw SysError(format("getting attributes of path `%1%'") % path);