[Haskell-cafe] Cabal hell (8.2.1,/Haskell Package/MacOS X)

Dear Cafe, I've had my first extended visit into cabal hell... ghc: 8.2.1 (Haskell Platform) cabal: 2.0.0.2 cabal-install: 2.0.0.0 OS: MacOS X 10.13 (High Sierra) I have problems around trying to install some standard packages: hlint, aeson. A typical error reported by cabal is <command line>: cannot satisfy -package-id hashable-1.2.6.1-14fEJP30YhAG9w115PODz0: hashable-1.2.6.1-14fEJP30YhAG9w115PODz0 is unusable due to shadowed dependencies: text-1.2.2.2-EGUst8sqNAZCw1xLPcmcMH FWIW, the versions of these packages reported by ghc-pkg are hashable-1.2.6.1 text-1.2.2.2 Suggestions welcome... Peace, Stu