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-rwxr-xr-xhadrian/src/Settings.hs3
1 files changed, 2 insertions, 1 deletions
diff --git a/hadrian/src/Settings.hs b/hadrian/src/Settings.hs
index 6a2fcfff2d..fd44af1916 100755
--- a/hadrian/src/Settings.hs
+++ b/hadrian/src/Settings.hs
@@ -74,7 +74,8 @@ flavour = do
(settingErrs, tweak) = applySettings kvs
when (not $ null settingErrs) $ fail
- $ "failed to apply key-value settings:" ++ unlines (map (" - " ++) settingErrs)
+ $ "failed to apply key-value settings:\n\t" ++ unlines (map (" - " ++) settingErrs) ++
+ "\t Entries should look something like \"stage1.containers.ghc.hs.opts += -Werror\""
case parseFlavour flavours flavourTransformers flavourName of
Left err -> fail err