# 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; pa-prelude = hsSelf.callPackage ./extra-pkgs/pa-prelude-0.1.0.0.nix { }; pa-error-tree = hsSelf.callPackage ./extra-pkgs/pa-error-tree-0.1.0.0.nix { }; pa-field-parser = hsSelf.callPackage ./extra-pkgs/pa-field-parser-0.1.0.1.nix { }; pa-label = hsSelf.callPackage ./extra-pkgs/pa-label-0.1.0.1.nix { }; pa-pretty = hsSelf.callPackage ./extra-pkgs/pa-pretty-0.1.1.0.nix { }; pa-json = hsSelf.callPackage ./extra-pkgs/pa-json-0.2.0.0.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 { }; }; }; }; }