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-rw-r--r--src/libstore/store.cc3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libstore/store.cc b/src/libstore/store.cc
index 0ac9473bc..03855408e 100644
--- a/src/libstore/store.cc
+++ b/src/libstore/store.cc
@@ -282,7 +282,8 @@ static PathSet getReferers(const Transaction & txn, const Path & storePath)
void setReferences(const Transaction & txn, const Path & storePath,
const PathSet & references)
{
- if (!isRealisablePath(txn, storePath))
+ /* For unrealisable paths, we can only clear the references. */
+ if (references.size() > 0 && !isRealisablePath(txn, storePath))
throw Error(
format("cannot set references for path `%1%' which is invalid and has no substitutes")
% storePath);