haskell-modules: implement overrideScope method for deep overriding
deepOverride turns out to be completely unfeasible for non-trivial overrides. Nix evaluates for an eternity, and then comes back saying: Too many heap sections: Increase MAXHINCR or MAX_HEAP_SECTS nix-instantiate killed by signal 6 The hand-written deep-override, on the other hand, performs the job in a fraction of a second, no problem. All bow to Russell O'Connor!
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@ -31,8 +31,12 @@ let
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mkDerivation = drv: args.mkDerivation (drv // f drv);
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});
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callPackageWithScope = scope: drv: args: (stdenv.lib.callPackageWith scope drv args) // {
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overrideScope = f: callPackageWithScope (fix (extend scope.__unfix__ f)) drv args;
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};
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defaultScope = pkgs // pkgs.xlibs // pkgs.gnome // self;
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callPackage = drv: args: stdenv.lib.callPackageWith defaultScope drv args;
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callPackage = drv: args: callPackageWithScope defaultScope drv args;
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in
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import ./hackage-packages.nix { inherit pkgs stdenv callPackage; } self // {
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