diff options
| -rw-r--r-- | src/libstore/gc.cc | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/libstore/gc.cc b/src/libstore/gc.cc index b415d5421..65220a9f6 100644 --- a/src/libstore/gc.cc +++ b/src/libstore/gc.cc @@ -791,7 +791,11 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results) assertStorePath(i); tryToDelete(state, i); if (state.dead.find(i) == state.dead.end()) - throw Error(format("cannot delete path '%1%' since it is still alive") % i); + throw Error(format( + "cannot delete path '%1%' since it is still alive. " + "To find out why use: " + "nix-store --query --roots" + ) % i); } } else if (options.maxFreed > 0) { |