On Sun, Jan 11, 2015 at 1:41 PM, Peter Simons <[email protected]> wrote: > The topic of today's posting is: Fixing Build Failures! > > > I know all about Cabal builds. How can I override a Nix build environment? > -------------------------------------------------------------------------- > > Every Haskell expression expects an argument called "mkDerivation" -- the > function that builds the derivation from the build description. You can > modify the environment of a build "foo" by replacing mkDerivation with a > version that applies some function "f" to the expression first: > > | foo.override (args: args // { > | mkDerivation = expr: args.mkDerivation (expr // f expr); > | }) > > All Haskell configuration modules import the 'lib' library > > <https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/haskell-modules/lib.nix> > that defines a bunch of neat little helper functions on top of this basic > mechanism. Just check out out the configuration-XYZ.nix files to see some > examples of how these functions are used.
How can I override a package to enable profiling? Is there an obvious way in general to apply the same override to a package and all its dependencies? Or, if it's impossible to generally override all of a package's dependencies, is there special support for profiling? -- Thomas Tuegel _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
