{ pkgs, haskellLib }:

with haskellLib;

let
  inherit (pkgs) lib;

  jailbreakWhileRevision = rev:
    overrideCabal (old: {
      jailbreak = assert old.revision or "0" == toString rev; true;
    });
  checkAgainAfter = pkg: ver: msg: act:
    if builtins.compareVersions pkg.version ver <= 0 then act
    else
      builtins.throw "Check if '${msg}' was resolved in ${pkg.pname} ${pkg.version} and update or remove this";
  jailbreakForCurrentVersion = p: v: checkAgainAfter p v "bad bounds" (doJailbreak p);

  # Workaround for a ghc-9.6 issue: https://gitlab.haskell.org/ghc/ghc/-/issues/23392
  disableParallelBuilding = overrideCabal (drv: { enableParallelBuilding = false; });
in

self: super: {
  llvmPackages = lib.dontRecurseIntoAttrs self.ghc.llvmPackages;

  # Disable GHC core libraries
  array = null;
  base = null;
  binary = null;
  bytestring = null;
  Cabal = null;
  Cabal-syntax = null;
  containers = null;
  deepseq = null;
  directory = null;
  exceptions = null;
  filepath = null;
  ghc-bignum = null;
  ghc-boot = null;
  ghc-boot-th = null;
  ghc-compact = null;
  ghc-heap = null;
  ghc-prim = null;
  ghci = null;
  haskeline = null;
  hpc = null;
  integer-gmp = null;
  libiserv = null;
  mtl = null;
  parsec = null;
  pretty = null;
  process = null;
  rts = null;
  stm = null;
  system-cxx-std-lib = null;
  template-haskell = null;
  # terminfo is not built if GHC is a cross compiler
  terminfo = if pkgs.stdenv.hostPlatform == pkgs.stdenv.buildPlatform then null else doDistribute self.terminfo_0_4_1_6;
  text = null;
  time = null;
  transformers = null;
  unix = null;
  xhtml = null;

  #
  # Version deviations from Stackage LTS
  #

  # Too strict upper bound on template-haskell
  # https://github.com/mokus0/th-extras/pull/21
  th-extras = doJailbreak super.th-extras;

  # not in Stackage, needs to match ghc-lib
  ghc-tags = doDistribute self.ghc-tags_1_7;

  #
  # Too strict bounds without upstream fix
  #

  # Forbids transformers >= 0.6
  quickcheck-classes-base = doJailbreak super.quickcheck-classes-base;
  # https://github.com/Gabriella439/Haskell-Break-Library/pull/3
  break = doJailbreak super.break;
  # Forbids mtl >= 2.3
  ChasingBottoms = doJailbreak super.ChasingBottoms;
  # Forbids base >= 4.18
  cabal-install-solver = doJailbreak super.cabal-install-solver;
  cabal-install = doJailbreak super.cabal-install;

  # Forbids base >= 4.18, fix proposed: https://github.com/sjakobi/newtype-generics/pull/25
  newtype-generics = jailbreakForCurrentVersion super.newtype-generics "0.6.2";

  # Jailbreaks for servant <0.20
  servant-lucid = doJailbreak super.servant-lucid;

  lifted-base = dontCheck super.lifted-base;
  hw-prim = dontCheck (doJailbreak super.hw-prim);
  stm-containers = dontCheck super.stm-containers;
  regex-tdfa = dontCheck super.regex-tdfa;
  hiedb = dontCheck super.hiedb;
  retrie = dontCheck super.retrie;
  # https://github.com/kowainik/relude/issues/436
  relude = dontCheck (doJailbreak super.relude);

  inherit (pkgs.lib.mapAttrs (_: doJailbreak ) super)
    ghc-trace-events
    gi-cairo-connector          # mtl <2.3
    ghc-prof                    # base <4.18
    env-guard                   # doctest <0.21
    package-version             # doctest <0.21, tasty-hedgehog <1.4
  ;

  # Avoid triggering an issue in ghc-9.6.2
  gi-gtk = disableParallelBuilding super.gi-gtk;

  # Pending text-2.0 support https://github.com/gtk2hs/gtk2hs/issues/327
  gtk = doJailbreak super.gtk;

  # 2023-12-23: It needs this to build under ghc-9.6.3.
  #   A factor of 100 is insufficent, 200 seems seems to work.
  hip = appendConfigureFlag "--ghc-options=-fsimpl-tick-factor=200" super.hip;

  # Doctest comments have bogus imports.
  bsb-http-chunked = dontCheck super.bsb-http-chunked;

  # This can be removed once https://github.com/typeclasses/ascii-predicates/pull/1
  # is merged and in a release that's being tracked.
  ascii-predicates = appendPatch
    (pkgs.fetchpatch
      { url = "https://github.com/typeclasses/ascii-predicates/commit/2e6d9ed45987a8566f3a77eedf7836055c076d1a.patch";
        name = "ascii-predicates-pull-1.patch";
        relative = "ascii-predicates";
        sha256 = "sha256-4JguQFZNRQpjZThLrAo13jNeypvLfqFp6o7c1bnkmZo=";
      })
    super.ascii-predicates;

  # This can be removed once https://github.com/typeclasses/ascii-numbers/pull/1
  # is merged and in a release that's being tracked.
  ascii-numbers = appendPatch
    (pkgs.fetchpatch
      { url = "https://github.com/typeclasses/ascii-numbers/commit/e9474ad91bc997891f1a46afd5d0bdf9b9f7d768.patch";
        name = "ascii-numbers-pull-1.patch";
        relative = "ascii-numbers";
        sha256 = "sha256-buw1UeW57CFefEfqdDUraSyQ+H/NvCZOv6WF2ORiYQg=";
      })
    super.ascii-numbers;

  # Fix ghc-9.6.x build errors.
  libmpd = appendPatch
    # https://github.com/vimus/libmpd-haskell/pull/138
    (pkgs.fetchpatch { url = "https://github.com/vimus/libmpd-haskell/compare/95d3b3bab5858d6d1f0e079d0ab7c2d182336acb...5737096a339edc265a663f51ad9d29baee262694.patch";
                       name = "vimus-libmpd-haskell-pull-138.patch";
                       sha256 = "sha256-CvvylXyRmoCoRJP2MzRwL0SBbrEzDGqAjXS+4LsLutQ=";
                     })
    super.libmpd;

  # Apply patch from PR with mtl-2.3 fix.
  ConfigFile = overrideCabal (drv: {
    editedCabalFile = null;
    buildDepends = drv.buildDepends or [] ++ [ self.HUnit ];
    patches = [(pkgs.fetchpatch {
      # https://github.com/jgoerzen/configfile/pull/12
      name = "ConfigFile-pr-12.patch";
      url = "https://github.com/jgoerzen/configfile/compare/d0a2e654be0b73eadbf2a50661d00574ad7b6f87...83ee30b43f74d2b6781269072cf5ed0f0e00012f.patch";
      sha256 = "sha256-b7u9GiIAd2xpOrM0MfILHNb6Nt7070lNRIadn2l3DfQ=";
    })];
  }) super.ConfigFile;

  # This runs into the following GHC bug currently affecting 9.6.* and 9.8.* as
  # well as 9.10.1: https://gitlab.haskell.org/ghc/ghc/-/issues/24432
  inherit (lib.mapAttrs (_: overrideCabal (drv: {
      badPlatforms = drv.badPlatforms or [ ] ++ [ "aarch64-linux" ];
    })) super)
    mueval
    lambdabot
    lambdabot-haskell-plugins
    ;
}
# super.ghc is required to break infinite recursion as Nix is strict in the attrNames
// lib.optionalAttrs (pkgs.stdenv.hostPlatform.isAarch64 && lib.versionOlder super.ghc.version "9.6.4") {
  # The NCG backend for aarch64 generates invalid jumps in some situations,
  # the workaround on 9.6 is to revert to the LLVM backend (which is used
  # for these sorts of situations even on 9.2 and 9.4).
  # https://gitlab.haskell.org/ghc/ghc/-/issues/23746#note_525318
  inherit (lib.mapAttrs (_: self.forceLlvmCodegenBackend) super)
    tls
    mmark
    ;
}