I sent a pull request to add time 1.4.* support to hakyll: https://github.com/jaspervdj/hakyll/pull/360
Might make it easier for <7.10 users in the future. - Adam On Sat, Aug 1, 2015 at 3:34 PM, Adam Bergmark <a...@bergmark.nl> wrote: > It seems like you have time-1.4.2 installed, the latest GHC (7.10) comes > with time 1.5.*. Are you sure you are on 7.10? > > The core of the problem is that hakyll needs time >= 1.5, and unix is > using the pre-installed time-1.4.2. This is rejected because only one > version of a library can be used in the same install plan. > > As the error message suggests you can you increase the backjump limit so > I'd try that first. I typically pass --reorder-goals --max-backjumps=-1 to > cabal-install. Running this sometimes takes a long time, but it will finish > eventually. > > You can also try installing an older version of hakyll that works with > time-1.4.2 (see the hackage page for info on older versions). > > Lastly, are you using a sandbox? It also helps with reducing problems. I > never install anything in the global or user level package db, only in > sandboxes. > > HTH, > Adam > > > > On Sat, Aug 1, 2015 at 2:36 PM, Peder Jakobsen <pjakob...@gmail.com> > wrote: > >> Hi, >> >> Been with Haskell just for few days, and thought it would be a good >> exercise to run a static site generator to get familiar with various tools, >> and I’m already running into “cabal hell” I think. :( >> >> >> $ cabal install hakyll >> Resolving dependencies... >> cabal: Could not resolve dependencies: >> trying: hakyll-4.7.2.0 (user goal) >> next goal: time (dependency of hakyll-4.7.2.0) >> rejecting: time-1.4.2/installed-d67... (conflict: hakyll => time>=1.5 && >> <1.6) >> trying: time-1.5.0.1 >> trying: process-1.2.0.0/installed-3a4... (dependency of hakyll-4.7.2.0) >> next goal: unix (dependency of process-1.2.0.0/installed-3a4...) >> rejecting: unix-2.7.0.1/installed-8ad... (conflict: time==1.5.0.1, unix => >> time==1.4.2/installed-d67...) >> rejecting: unix-2.7.1.0, 2.7.0.1, 2.7.0.0, 2.6.0.1, 2.6.0.0, 2.5.1.1, >> 2.5.1.0, >> 2.5.0.0, 2.4.2.0, 2.4.1.0, 2.4.0.2, 2.4.0.1, 2.4.0.0, 2.3.2.0, 2.3.1.0, >> 2.3.0.0, 2.2.0.0, 2.0 (conflict: process => unix==2.7.0.1/installed-8ad.. >> .) >> Backjump limit reached (change with --max-backjumps). >> >> >> I’m running OS X Yosemite 10.2.2 with all the latest versions of Haskell >> and cabal. >> >> Thanks you for listening. :) >> >> Peder >> >> _______________________________________________ >> cabal-devel mailing list >> cabal-devel@haskell.org >> http://mail.haskell.org/cgi-bin/mailman/listinfo/cabal-devel >> >> >
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