Dear Peter,

I recently had a similar problem with the same Haskell Platform version
but on a Macmini (running Lion as well).

I learnt that you have to install the 'command line tools' by using the
'preferences' of your XCode installation. After that, everything will work.

Best regards,

Salvador.

El 10/03/12 10:15, Peter escribió:

Hello - I'm a new user, having some trouble installing the Haskell Platform (2011.4.0.0 64bit.pkg) on a Macbook Pro (10.7.3). I installed Xcode 4.3.1 (4E1019), then the Haskell Platform. When I double-click on the Platform package icon, I get an installation dialogue with an error message reading "Developer Tools Missing - Please install Xcode developer tools first." Are Xcode developer tools something distinct from Xcode itself? I'm mystified by this error message. Any assistance would be greatly appreciated - thank you.
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