Excerpts from Juan Daugherty's message of Sun Aug 07 18:30:09 +0200 2011: > I built leksah yesterday from scratch on debian 6 after being unable to do > so earlier on deb 5. I was surprised how many dependencies there were on > ghc6 and ghc6 plgs and how much ad hackery was necessary to get the > app built. Well, the cabal file says ghc < 7.1 ... Anyway its a nice sample to illustrate what's going on: summary: I didn't finish updating leksah because it would require me updating gtksourceview which probably would require me updating gnome, which could take a couple of hours or more.
HACK-NIX ============ http://dpaste.com/588859/ Its easy to see whatever hack-nix tries it fails at haddock. looking at its cabal file its clear why: I force ghc-6.12.x and most recent haddock requires ghc >= 7.x So the (first) fix is to add haddock-2.8.1 to the pool and run hack-nix without arguments. Next run is successful and the build starts. Second Failure: Setup: The program alex is required but it could not be found builder for `/nix/store/q419iwglqlgxvywjs59d2yy450yrajvc-haddock-2.8.1.drv' failed; keeping build directory `/tmp/nix-build-q419iwglqlgxvywjs59d2yy450yrajvc-haddock-2.8.1.drv-0' So the fix is to pass alex, happy to haddock because there is no way to tell cabal that an app requires alex,happy,... (there is a bug report though). 3rd Failure (adding gtk2hsBuildToolsFixed, pkgconfig to gktsourceview2) 4th Failure: Not updating gtksourceview (gtk library) which would be required because headers are missing. The headers are not contained in sources. So I'm stopping because I don't want to update gnome at this time :( compared to cabal-packages.nix ============================== first attempt: -iA haskellPackages.leksah: Configuring process-leksah-1.0.1.3... Setup: At least the following dependencies are missing: directory ==1.0.*, filepath ==1.1.* second attempt haskellPackages_ghc6123.leksah Configuring ltk-0.8.0.8... Setup: At least the following dependencies are missing: glib >=0.10.0 && <0.12, gtk >=0.10.0 && <0.12 And at this point I stop, cause I fear getting lost in managing dependencies manually. That's why I wrote hack-nix. Probably it can be easily fixed. The final issue will be gktsourceview anyway. Replying to your additional statements: > I'm glad to see this is being talked about and hopefully eventually > addressed in the large, i.e. the issue of lang specific pkg managers > running under Nix (gems, cabal, pear, whatever). Well - we have to discuss how such a solution should look like. I already mentioned that you eventually don't want 50.000 package description on disk if you use only 10 of them. Also we're far from packaging Eclipse plugins for instance. > I wouldn't want to try build leksah on NIxOS Its packaged. So it would have been much easier than using Debian! Well - after figuring out that you have to use haskellPackages_ghc6* instead of the default (7.0.2). > a desktop on NixOS anyway. You should make a difference between nixos and nixpkgs. nixpkgs can be used without NixOS on any system (eg debian). And we're talking about packages (similar to nixpkgs here, not the OS) Marc Weber _______________________________________________ nix-dev mailing list [email protected] https://mail.cs.uu.nl/mailman/listinfo/nix-dev
