Files
postgrest/nix/overlays/haskell-packages.nix
T

45 lines
1.3 KiB
Nix

{ compiler, extraOverrides ? (final: prev: { }) }:
self: super:
let
inherit (self.haskell) lib;
overrides =
final: prev:
rec {
# To pin custom versions of Haskell packages:
# protolude =
# prev.callHackageDirect
# {
# pkg = "protolude";
# ver = "0.3.0";
# sha256 = "0iwh4wsjhb7pms88lw1afhdal9f86nrrkkvv65f9wxbd1b159n72";
# }
# { };
#
# To get the sha256:
# nix-prefetch-url --unpack https://hackage.haskell.org/package/protolude-0.3.0/protolude-0.3.0.tar.gz
# To temporarily pin unreleased versions from GitHub:
# <name> =
# prev.callCabal2nixWithOptions "<name>" (super.fetchFromGitHub {
# owner = "<owner>";
# repo = "<repo>";
# rev = "<commit>";
# sha256 = "<sha256>";
# }) "--subpath=<subpath>" {};
#
# To get the sha256:
# nix-prefetch-url --unpack https://github.com/<owner>/<repo>/archive/<commit>.tar.gz
} // extraOverrides final prev;
in
{
haskell =
super.haskell // {
packages = super.haskell.packages // {
"${compiler}" =
super.haskell.packages."${compiler}".override { inherit overrides; };
};
};
}