13 Feb
                
                    2013
                
            
            
                13 Feb
                
                '13
                
            
            
            
        
    
                5:51 a.m.
            
        Now I get another error:
Error:<command line>: cannot satisfy -package wl-pprint
even if ‘wl-pprint’ is installed, and ‘cabal configure; cabal build’ runs fine.
It seems to me that you installed multiple GHCs and wl-pprint is not installed for one of them. Is my guess corrent? --Kazu