[Haskell-cafe] Is Cabal ignoring "-with-rtsopts"?

Hello guys, I'm integrating EKG in my webserver and I've stumbled upon a peculiar behaviour: Putting this inside my cabal manifest seems to not trigger any effect (EKG shows flat lines): GHC-Options: -Wall -threaded -Werror -fwarn-tabs -with-rtsopts=-T Whereas, if I run my webserver with "blablabla [...] +RTS -T" everything works as expected. What am I missing? I am on GHC 7.6.3, Cabal 1.18 and Mac OS X 64 bit. Alfredo