debug output

Simon Peyton Jones simonpj at
Mon Apr 24 12:31:04 UTC 2017

mk/flavours/ has

GhcStage2HcOpts    = -O -dcore-lint

GhcLibHcOpts       = -O -dcore-lint
How can I override these in my  E.g.

GhcLibHcOpts      += -ddebug-output
does not work.
Thanks. One should really be able to override anything.

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