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-rw-r--r--hadrian/src/Flavour.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/hadrian/src/Flavour.hs b/hadrian/src/Flavour.hs
index 0a4439827f..d2adbe356e 100644
--- a/hadrian/src/Flavour.hs
+++ b/hadrian/src/Flavour.hs
@@ -124,4 +124,5 @@ enableThreadSanitizer = addArgs $ mconcat
, builder (Ghc LinkHs) ? arg "-optl-fsanitize=thread"
, builder (Cc CompileC) ? (arg "-fsanitize=thread" <> arg "-DTSAN_ENABLED")
, builder (Cabal Flags) ? arg "thread-sanitizer"
+ , builder RunTest ? arg "--config=have_thread_sanitizer=True"
]