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-rw-r--r--src/nix-store/nix-store.cc6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/nix-store/nix-store.cc b/src/nix-store/nix-store.cc
index 6f315e509..f324056bb 100644
--- a/src/nix-store/nix-store.cc
+++ b/src/nix-store/nix-store.cc
@@ -592,9 +592,13 @@ static void opGC(Strings opFlags, Strings opArgs)
if (printRoots) {
Roots roots = store->findRoots(false);
+ std::set<std::pair<Path, Path>> roots2;
+ // Transpose and sort the roots.
for (auto & [target, links] : roots)
for (auto & link : links)
- cout << link << " -> " << target << std::endl;
+ roots2.emplace(link, target);
+ for (auto & [link, target] : roots2)
+ std::cout << link << " -> " << target << "\n";
}
else {