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# Defines an overlay for overriding Haskell packages, for example to
# avoid breakage currently present in nixpkgs or to modify package
# versions.
{ lib, ... }:
self: super: # overlay parameters for the nixpkgs overlay
let
haskellLib = self.haskell.lib.compose;
dhall-source = subdir: pkg:
haskellLib.overrideSrc
{
src = "${super.fetchFromGitHub {
owner = "Profpatsch";
repo = "dhall-haskell";
# https://github.com/dhall-lang/dhall-haskell/pull/2426
rev = "5e3a407d8ac826597d935d8398825a0ca73fc4e9";
sha256 = "005plj6kgxlkm9npaq07kmsgmiqk50dpwb9li9w1ly4aj1zgfjnd";
}}/${subdir}";
}
(haskellLib.overrideCabal { patches = [ ]; } pkg);
in
{
haskellPackages = super.haskellPackages.override {
overrides = hsSelf: hsSuper: {
# TODO: this is to fix a bug in dhall-nix
dhall = dhall-source "dhall" hsSuper.dhall;
dhall-nix = dhall-source "dhall-nix" hsSuper.dhall-nix;
};
};
haskell = lib.recursiveUpdate super.haskell {
packages.ghc8107 = super.haskell.packages.ghc8107.override {
overrides = hsSelf: hsSuper: {
# TODO(sterni): TODO(grfn): patch xanthous to work with random-fu 0.3.*,
# so we can use GHC 9.0.2 and benefit from upstream binary cache.
random-fu = hsSelf.callPackage ./extra-pkgs/random-fu-0.2.nix { };
rvar = hsSelf.callPackage ./extra-pkgs/rvar-0.2.nix { };
# TODO(grfn): port to brick 1.4 (EventM gains an additional type argument in 1.0)
brick = hsSelf.callPackage ./extra-pkgs/brick-0.73.nix { };
# TODO(sterni): upstream into nixpkgs
binary-orphans =
haskellLib.addBuildDepends [ hsSelf.OneTuple ] hsSuper.binary-orphans;
};
};
};
}
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