Hi guys, I am having an hard time installing the haskell-src and haskell-src-exts packages, since both seem to have problems with happy. I have installed happy 1.18.2 successfully, but it does not seem to be visible (although the happy executable is in my path). I get the errors: $ cabal install haskell-src Resolving dependencies... 'haskell-src-1.0.1.3' is cached. Configuring haskell-src-1.0.1.3... Preprocessing library haskell-src-1.0.1.3... cabal: The program happy is required but it could not be found cabal: Error: some packages failed to install: haskell-src-1.0.1.3 failed during the building phase. The exception was: exit: ExitFailure 1 $ cabal install haskell-src-exts Resolving dependencies... 'haskell-src-exts-0.3.9' is cached. Configuring haskell-src-exts-0.3.9... cabal: happy version >=1.17 is required but it could not be found. cabal: Error: some packages failed to install: haskell-src-exts-0.3.9 failed during the configure step. The exception was: exit: ExitFailure 1 Is this some kind of bug in cabal, or in the packages themselves? Thanks, hugo -- www.di.uminho.pt/~hpacheco