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-rw-r--r--src/libstore/store-api.hh4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index 14890f5225ad..61bcaf50507f 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -349,6 +349,10 @@ void exportPaths(StoreAPI & store, const Paths & paths,
     bool sign, Sink & sink);
 
 
+MakeError(SubstError, Error)
+MakeError(BuildError, Error) /* denotes a permanent build failure */
+
+
 }