Hello all, The cabal/cabal-install bug tracker seems to be down, so I'm not sure if this is a known issue or not... When playing around with JHC earlier I ran into the following errors: $> cabal --version cabal-install version 0.10.2 using version 1.10.2.0 of the Cabal library $> cabal install --dry-run --jhc --verbose base Reading available packages... Resolving dependencies... cabal: internal error: impossible $> cabal install --dry-run --ghc --verbose base Reading available packages... Resolving dependencies... cabal: Distribution/Client/Dependency/TopDown.hs:171:37-73: Non-exhaustive patterns in lambda $> cabal install --dry-run --verbose base Reading available packages... Resolving dependencies... cabal: Distribution/Client/Dependency/TopDown.hs:171:37-73: Non-exhaustive patterns in lambda I've seen that problem before, though I can't recall where off-hand. Anyone know if this (a) has been reported, (b) has been fixed? -- Live well, ~wren