ghc profiler beginner

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ghc profiler beginner

José Prous
I never used the ghc profiler before, when I try to compile the program
with:
ghc -prof -auto -O2 -o Main --make Main.hs

I get:
Could not find module `Data.Binary.IEEE754':
Perhaps you haven't installed the profiling libraries for package
`data-binary-ieee754-0.3'?
Use -v to see a list of the files searched for.

Is there a way to tell the profiler to ignore the external libraries or I
have to recompile all the libraries with profiling enabled?

thanks
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