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{ pkgs, haskellLib }:

let
  inherit (pkgs) fetchpatch lib;
  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";
in

with haskellLib;
self: super: let
  jailbreakForCurrentVersion = p: v: checkAgainAfter p v "bad bounds" (doJailbreak p);
in {
  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;
  # GHC only builds terminfo if it is a native compiler
  terminfo = if pkgs.stdenv.hostPlatform == pkgs.stdenv.buildPlatform then null else self.terminfo_0_4_1_6;
  text = null;
  time = null;
  transformers = null;
  unix = null;
  # GHC only bundles the xhtml library if haddock is enabled, check if this is
  # still the case when updating: https://gitlab.haskell.org/ghc/ghc/-/blob/0198841877f6f04269d6050892b98b5c3807ce4c/ghc.mk#L463
  xhtml = if self.ghc.hasHaddock or true then null else self.xhtml_3000_3_0_0;

  # Jailbreaks & Version Updates

  hashable-time = doJailbreak super.hashable-time;
  libmpd = doJailbreak super.libmpd;
  lens-family-th = doJailbreak super.lens-family-th;  # template-haskell <2.19

  # generically needs base-orphans for 9.4 only
  base-orphans = dontCheck (doDistribute super.base-orphans);

  # the dontHaddock is due to a GHC panic. might be this bug, not sure.
  # https://gitlab.haskell.org/ghc/ghc/-/issues/21619
  hedgehog = dontHaddock super.hedgehog;

  hpack = overrideCabal (drv: {
    # Cabal 3.6 seems to preserve comments when reading, which makes this test fail
    # 2021-10-10: 9.2.1 is not yet supported (also no issue)
    testFlags = [
      "--skip=/Hpack/renderCabalFile/is inverse to readCabalFile/"
    ] ++ drv.testFlags or [];
  }) (doJailbreak super.hpack);

  # Apply patches from head.hackage.
  language-haskell-extract = appendPatch (pkgs.fetchpatch {
    url = "https://gitlab.haskell.org/ghc/head.hackage/-/raw/dfd024c9a336c752288ec35879017a43bd7e85a0/patches/language-haskell-extract-0.2.4.patch";
    sha256 = "0w4y3v69nd3yafpml4gr23l94bdhbmx8xky48a59lckmz5x9fgxv";
  }) (doJailbreak super.language-haskell-extract);

  # Tests depend on `parseTime` which is no longer available
  hourglass = dontCheck super.hourglass;

  # https://github.com/sjakobi/bsb-http-chunked/issues/38
  bsb-http-chunked = dontCheck super.bsb-http-chunked;

  # 2022-08-01: Tests are broken on ghc 9.2.4: https://github.com/wz1000/HieDb/issues/46
  hiedb = dontCheck super.hiedb;

  # 2022-10-06: https://gitlab.haskell.org/ghc/ghc/-/issues/22260
  ghc-check = dontHaddock super.ghc-check;

  ghc-tags = self.ghc-tags_1_6;

  # Too strict upper bound on template-haskell
  # https://github.com/mokus0/th-extras/issues/18
  th-extras = doJailbreak super.th-extras;

  # requires newer versions to work with GHC 9.4
  servant = doJailbreak super.servant;
  servant-server = doJailbreak super.servant-server;
  servant-auth = doJailbreak super.servant-auth;
  servant-auth-swagger = doJailbreak super.servant-auth-swagger;
  servant-swagger = doJailbreak super.servant-swagger;
  servant-client-core = doJailbreak super.servant-client-core;
  servant-client = doJailbreak super.servant-client;
  # https://github.com/kowainik/relude/issues/436
  relude = dontCheck super.relude;

  fourmolu = overrideCabal (drv: {
    libraryHaskellDepends = drv.libraryHaskellDepends ++ [ self.file-embed ];
  }) (disableCabalFlag "fixity-th" super.fourmolu);
}