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diff --git a/hadrian/src/Settings/Flavours/Profiled.hs b/hadrian/src/Settings/Flavours/Profiled.hs
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+++ b/hadrian/src/Settings/Flavours/Profiled.hs
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+module Settings.Flavours.Profiled (profiledFlavour) where
+
+import Expression
+import Flavour
+import {-# SOURCE #-} Settings.Default
+import Settings.Flavours.Common (naturalInBaseFixArgs)
+
+-- Please update doc/flavours.md when changing this file.
+profiledFlavour :: Flavour
+profiledFlavour = defaultFlavour
+    { name        = "prof"
+    , args        = defaultBuilderArgs <> profiledArgs <> defaultPackageArgs
+    , ghcProfiled = True }
+
+profiledArgs :: Args
+profiledArgs = sourceArgs SourceArgs
+    { hsDefault  = mconcat
+        [ pure ["-O0", "-H64m"]
+        , naturalInBaseFixArgs
+        ]
+    , hsLibrary  = notStage0 ? arg "-O"
+    , hsCompiler = arg "-O"
+    , hsGhc      = arg "-O" }