Hi there, I had something like this before but now I checked explicitly: I did 'ghc-pkg check' which showed nothing. Fine! Then I did 'cabal install gitit' and after successfully installing gitit I ran 'ghc-pkg check' again and got: There are problems in package yesod-form-0.1.0.1: dependency "xss-sanitize-0.2.6-bfb18d04010fadbceea5ba5136c33373" doesn't exist There are problems in package warp-0.4.0.1: dependency "sendfile-0.7.3-1d8424f5c18454ab33888680f53a7340" doesn't exist There are problems in package happstack-state-6.0.0: dependency "hslogger-1.1.4-d65ba05b9e69912e34b53b6153cc40ff" doesn't exist There are problems in package happstack-jmacro-6.0.0: dependency "happstack-server-6.1.3-8a8613c407db656b76de3be81e531fb5" doesn't exist The following packages are broken, either because they have a problem listed above, or because they depend on a broken package. yesod-form-0.1.0.1 warp-0.4.0.1 happstack-state-6.0.0 happstack-jmacro-6.0.0 yesod-0.8.2.1 yesod-auth-0.4.0.2 For example, hslogger was reinstalled for some reason and got a new id. Now it is hslogger-1.1.4-dff59692d8bdac1df0c425c217a20b0c.conf Why is this happening? Could I prevent it somehow? -- Manfred