On 5 May 2010 12:04, Maciej Piechotka
1. I downloaded happstack-utile[1] 2. Edited cabal file 3. Installed it successfully linking with parsec 3.1 4. I tried to run cabal install happstack --constraint 'parsec >= 3' 5. It complains that happstack-utile needs to be installed against parsec 2
[1] Now it is HStringTemplate but problem is the same
Did you try editing the HStringTemplate cabal file to remove its constraint against parsec >= 3? Also, is there any reason why you're forcing that constraint through (yes, upstream should start using parec-3, but why use --constraint to try and force it yourself)?
If I just run: % runhaskell Setup.hs configure --user All seems to be ok but % cabal install Wants to reinstall packages (or complains about constraints).
Note that with its dependency resolution stuff, cabal-install tries to ensure you have an entire working and consistent set of dependencies, whereas doing it manually will happily break everything.
It is not a missing dependency. It is that the cabal-install tries to use dependencies from hackage instead of installed packages.
Not quite: if its already installed and working, cabal-install will use it; if there is some inconsistency (e.g. package Foo was built against Bar-x but you now have Bar-y installed) then cabal-install will try rebuilding that package; note that if you installed it from a local edited repository then cabal-install doesn't know this and will get the official hackage version. Also, I note that you seem to use the Gentoo Haskell overlay (as you've made bug reports about it) but you're also building packages by hand; this can also lead to problems (don't mix your packages kids!). -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com