1) Check whether you have a /Developer directory, and if not 2) look in your Applications folder to see whether you have program called Install XCode and if so run that It may be that you just downloaded the installer and did not run it? Doaitse On Mar 10, 2012, at 10:15 , Peter wrote:

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. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

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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