Finite Improbability

When on a Mac, there are two locations to install a Framework: system-wide (/Library/Frameworks) and user-local (~/Library/Frameworks). The user-local location is (obviously) checked first.

If you’re trying to install GHC and it keeps giving you error messages like:

checking for path to top of build tree... dyld: Library not loaded: GMP.framework/Versions/A/GMP
Referenced from: /Users/ajones/programming/haskell/ghc-6.8.2/utils/pwd/pwd
Reason: Incompatible library version: pwd requires version 8.0.0 or later, but GMP provides version 7.0.0 

It might be worthwhile to make sure you don’t have an old version of GMP.Framework installed in your user local frameworks library.