{ pkgs, haskellLib }:

with haskellLib;

self: super: {

  # Use the latest LLVM.
  inherit (pkgs) llvmPackages;

  # Disable GHC 8.4.x core libraries.
  #
  # Verify against:
  # ls /nix/store/wnh3kxra586h9wvxrn62g4lmsri2akds-ghc-8.4.20180115/lib/ghc-8.4.20180115/ -1 | sort | grep -e '-' | grep -Ev '(txt|h|targets)$'
  array = null;
  base = null;
  binary = null;
  bytestring = null;
  Cabal = null;
  containers = null;
  deepseq = null;
  directory = null;
  filepath = null;
  bin-package-db = null;
  ghc-boot = null;
  ghc-boot-th = null;
  ghc-compact = null;
  ghci = null;
  ghc-prim = null;
  haskeline = null;
  hpc = null;
  integer-gmp = null;
  mtl = null;
  parsec = null;
  pretty = null;
  process = null;
  stm = null;
  template-haskell = null;
  terminfo = null;
  text = null;
  time = null;
  transformers = null;
  unix = null;
  xhtml = null;

  # GHC 8.4.x needs newer versions than LTS-10.x offers by default.
  ## haddock: panic! (the 'impossible' happened)
  ##   (GHC version 8.4.20180122 for x86_64-unknown-linux):
  ## 	extractDecl
  ## Ambiguous decl for Arg in class:
  ##     class Example e where
  ##       type Arg e :: *
  ##       {-# MINIMAL evaluateExample #-}
  ##       evaluateExample ::
  ##         e
  ##         -> Params
  ##            -> ActionWith Arg e -> IO () -> ProgressCallback -> IO Result
  ## Matches:
  ##     []
  ## Call stack:
  ##     CallStack (from HasCallStack):
  ##       callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable
  ##       pprPanic, called at utils/haddock/haddock-api/src/Haddock/Interface/Create.hs:1013:16 in main:Haddock.Interface.Create
  ## Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
  hspec = dontHaddock (dontCheck super.hspec_2_4_7);        # test suite causes an infinite loop

  ## Setup: Encountered missing dependencies:
  ## QuickCheck >=2.3 && <2.10
  ## builder for ‘/nix/store/d60y5jwn5bpgk2p8ps23c129dcw7whg6-test-framework-0.8.2.0.drv’ failed with exit code 1
  ## error: build of ‘/nix/store/d60y5jwn5bpgk2p8ps23c129dcw7whg6-test-framework-0.8.2.0.drv’ failed
  test-framework = dontCheck self.test-framework_0_8_2_0;

  # Undo the override in `configuration-common.nix`: GHC 8.4 bumps Cabal to 2.1:
  # Distribution/Simple/CCompiler.hs:64:10: error:
  #  • No instance for (Semigroup CDialect)
  #      arising from the superclasses of an instance declaration
  #  • In the instance declaration for ‘Monoid CDialect’
  #     |
  #  64 | instance Monoid CDialect where
  #     |          ^^^^^^^^^^^^^^^
  jailbreak-cabal = super.jailbreak-cabal.override { Cabal = self.Cabal; }; #pkgs.haskell.packages.ghc822.jailbreak-cabal;

  ## Shadowed:

  ## Needs bump to a versioned attribute
  ## 
  ##     • Could not deduce (Semigroup (Dict a))
  ##         arising from the superclasses of an instance declaration
  ##       from the context: a
  constraints = super.constraints_0_10;

  hspec-core = overrideCabal super.hspec-core_2_4_7 (drv: {
    ## Needs bump to a versioned attribute
    ## 
    ##     • No instance for (Semigroup Summary)
    ##         arising from the superclasses of an instance declaration
    ##     • In the instance declaration for ‘Monoid Summary’
    doCheck         = false;
  });

  ## Needs bump to a versioned attribute
  ## 
  ## breaks hspec:
  ## Setup: Encountered missing dependencies:
  ## hspec-discover ==2.4.7
  hspec-discover = super.hspec-discover_2_4_7;

  ## Needs bump to a versioned attribute
  ## 
  ##     • No instance for (Semigroup Metadatas)
  ##         arising from the superclasses of an instance declaration
  ##     • In the instance declaration for ‘Monoid Metadatas’
  JuicyPixels = super.JuicyPixels_3_2_9_4;

  ## Needs bump to a versioned attribute
  ## 
  ##     • Could not deduce (Semigroup (a :->: b))
  ##         arising from the superclasses of an instance declaration
  ##       from the context: (HasTrie a, Monoid b)
  MemoTrie = super.MemoTrie_0_6_9;

  semigroupoids = overrideCabal super.semigroupoids_5_2_2 (drv: {
    ## Needs bump to a versioned attribute
    ## 
    ##     • Variable not in scope: mappend :: Seq a -> Seq a -> Seq a
    ## CABAL-MISSING-DEPS
    ## Setup: Encountered missing dependencies:
    ## ghc >=7.0 && <8.4
    ## builder for ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed
    doCheck         = false;
  });

  ## Needs bump to a versioned attribute
  ## 
  ##     • Could not deduce (Semigroup (Traversal f))
  ##         arising from the superclasses of an instance declaration
  ##       from the context: Applicative f
  tasty = super.tasty_1_0_0_1;

  ## Needs bump to a versioned attribute
  ## 
  ## Setup: Encountered missing dependencies:
  ## template-haskell >=2.4 && <2.13
  ## builder for ‘/nix/store/sq6cc33h4zk1wns2fsyv8cj6clcf6hwi-th-lift-0.7.7.drv’ failed with exit code 1
  ## error: build of ‘/nix/store/sq6cc33h4zk1wns2fsyv8cj6clcf6hwi-th-lift-0.7.7.drv’ failed
  th-lift = super.th-lift_0_7_8;


  ## On Hackage:

  happy = overrideCabal super.happy (drv: {
    ## On Hackage, awaiting for import
    ## 
    ##     Ambiguous occurrence ‘<>’
    ##     It could refer to either ‘Prelude.<>’,
    ##                              imported from ‘Prelude’ at src/PrettyGrammar.hs:1:8-20
    version         = "1.19.9";
    sha256          = "138xpxdb7x62lpmgmb6b3v3vgdqqvqn4273jaap3mjmc2gla709y";
  });


  ## Upstreamed

  free = overrideCabal super.free (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ##     • Could not deduce (Semigroup (IterT m a))
    ##         arising from the superclasses of an instance declaration
    ##       from the context: (Monad m, Monoid a)
    src = pkgs.fetchFromGitHub {
      owner  = "ekmett";
      repo   = "free";
      rev    = "fcefc71ed302f2eaf60f020046bad392338b3109";
      sha256 = "0mfrd7y97pgqmb2i66jn5xwjpcrgnfcqq8dzkxqgx1b5wjdydq70";
    };
    ## Setup: Encountered missing dependencies:
    ## transformers-base <0.5
    ## builder for ‘/nix/store/3yvaqx5qcg1fb3nnyc273fkhgfh73pgv-free-4.12.4.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/3yvaqx5qcg1fb3nnyc273fkhgfh73pgv-free-4.12.4.drv’ failed
    libraryHaskellDepends = drv.libraryHaskellDepends ++ [ self.transformers-base ];
  });

  haskell-gi = overrideCabal super.haskell-gi (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ## Setup: Encountered missing dependencies:
    ## haskell-gi-base ==0.20.*
    ## builder for ‘/nix/store/q0qkq2gzmdnkvdz6xl7svv5305chbr4b-haskell-gi-0.20.3.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/q0qkq2gzmdnkvdz6xl7svv5305chbr4b-haskell-gi-0.20.3.drv’ failed
    src = pkgs.fetchFromGitHub {
      owner  = "haskell-gi";
      repo   = "haskell-gi";
      rev    = "30d2e6415c5b57760f8754cd3003eb07483d60e6";
      sha256 = "1l3qm97gcjih695hhj80rbpnd72prnc81lg5y373yj8jk9f6ypbr";
    };
    ## CABAL-MISSING-DEPS
    ## Setup: Encountered missing dependencies:
    ## ghc >=7.0 && <8.4
    ## builder for ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed
    doCheck         = false;
  });

  haskell-gi-base = overrideCabal super.haskell-gi-base (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ## breaks haskell-gi:
    ## Setup: Encountered missing dependencies:
    ## haskell-gi-base ==0.21.*
    src = pkgs.fetchFromGitHub {
      owner  = "haskell-gi";
      repo   = "haskell-gi";
      rev    = "30d2e6415c5b57760f8754cd3003eb07483d60e6";
      sha256 = "1l3qm97gcjih695hhj80rbpnd72prnc81lg5y373yj8jk9f6ypbr";
    };
    ## Setup: Encountered missing dependencies:
    ## attoparsec ==0.13.*,
    ## doctest >=0.8,
    ## haskell-gi-base ==0.21.*,
    ## pretty-show -any,
    ## regex-tdfa >=1.2,
    prePatch        = "cd base; ";
  });

  haskell-src-exts = overrideCabal super.haskell-src-exts (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ##     • Could not deduce (Semigroup (ParseResult m))
    ##         arising from the superclasses of an instance declaration
    ##       from the context: Monoid m
    src = pkgs.fetchFromGitHub {
      owner  = "haskell-suite";
      repo   = "haskell-src-exts";
      rev    = "935f6f0915e89c314b686bdbdc6980c72335ba3c";
      sha256 = "1v3c1bd5q07qncqfbikvs8h3r4dr500blm5xv3b4jqqv69f0iam9";
    };
  });

  hedgehog = overrideCabal super.hedgehog (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ## /nix/store/78sxg2kvl2klplqfx22s6b42lds7qq23-stdenv/setup: line 99: cd: hedgehog: No such file or directory
    src = pkgs.fetchFromGitHub {
      owner  = "hedgehogqa";
      repo   = "haskell-hedgehog";
      rev    = "7a4fab73670bc33838f2b5f25eb824ee550079ce";
      sha256 = "1l8maassmklf6wgairk7llxvlbwxngv0dzx0fwnqx6hsb32sms05";
    };
    ## jailbreak-cabal: dieVerbatim: user error (jailbreak-cabal: Error Parsing: file "hedgehog.cabal" doesn't exist. Cannot
    prePatch        = "cd hedgehog; ";
  });

  lambdacube-compiler = overrideCabal super.lambdacube-compiler (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ## Setup: Encountered missing dependencies:
    ## aeson >=0.9 && <0.12,
    ## base >=4.7 && <4.10,
    ## directory ==1.2.*,
    ## megaparsec ==5.0.*,
    ## vector ==0.11.*
    src = pkgs.fetchFromGitHub {
      owner  = "lambdacube3d";
      repo   = "lambdacube-compiler";
      rev    = "ff6e3b136eede172f20ea8a0f7017ad1ecd029b8";
      sha256 = "0srzrq5s7pdbygn7vdipxl12a3gbyb6bpa7frbh8zwhb9fz0jx5m";
    };
  });

  lambdacube-ir = overrideCabal super.lambdacube-ir (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ## /nix/store/78sxg2kvl2klplqfx22s6b42lds7qq23-stdenv/setup: line 99: cd: lambdacube-ir.haskell: No such file or directory
    src = pkgs.fetchFromGitHub {
      owner  = "lambdacube3d";
      repo   = "lambdacube-ir";
      rev    = "b86318b510ef59606c5b7c882cad33af52ce257c";
      sha256 = "0j4r6b32lcm6jg653xzg9ijxkfjahlb4x026mv5dhs18kvgqhr8x";
    };
    ## Setup: No cabal file found.
    prePatch        = "cd lambdacube-ir.haskell; ";
  });

  lens = overrideCabal super.lens (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ##     • Could not deduce (Apply f)
    ##         arising from the superclasses of an instance declaration
    ##       from the context: (Contravariant f, Applicative f)
    src = pkgs.fetchFromGitHub {
      owner  = "ekmett";
      repo   = "lens";
      rev    = "4ad49eaf2448d856f0433fe5a4232f1e8fa87eb0";
      sha256 = "0sd08v6syadplhk5d21yi7qffbjncn8z1bqlwz9nyyb0xja8s8wa";
    };
    ## CABAL-MISSING-DEPS
    ## Setup: Encountered missing dependencies:
    ## ghc >=7.0 && <8.4
    ## builder for ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed
    doCheck         = false;
    ## Setup: Encountered missing dependencies:
    ## template-haskell >=2.4 && <2.13
    ## builder for ‘/nix/store/fvrc4s96ym33i74y794nap7xai9p69fa-lens-4.15.4.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/fvrc4s96ym33i74y794nap7xai9p69fa-lens-4.15.4.drv’ failed
    jailbreak       = true;
  });

  simple-reflect = overrideCabal super.simple-reflect (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ##     • No instance for (Semigroup Expr)
    ##         arising from the superclasses of an instance declaration
    ##     • In the instance declaration for ‘Monoid Expr’
    src = pkgs.fetchFromGitHub {
      owner  = "twanvl";
      repo   = "simple-reflect";
      rev    = "c357e55da9a712dc5dbbfe6e36394e4ada2db310";
      sha256 = "15q41b00l8y51xzhbj5zhddyh3gi7gvml033w8mm2fih458jf6yq";
    };
  });

  singletons = overrideCabal super.singletons (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ## Setup: Encountered missing dependencies:
    ## th-desugar ==1.7.*
    ## builder for ‘/nix/store/g5jl22kpq8fnrg8ldphxndri759nxwzf-singletons-2.3.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/g5jl22kpq8fnrg8ldphxndri759nxwzf-singletons-2.3.1.drv’ failed
    src = pkgs.fetchFromGitHub {
      owner  = "goldfirere";
      repo   = "singletons";
      rev    = "23aa4bdaf05ce025a2493b35ec3c26cc94e3fdce";
      sha256 = "0hw12v4z8jxmykc3j8z6g27swmfpxv40bgnx7nl0ialpwbz9mz27";
    };
  });

  stringbuilder = overrideCabal super.stringbuilder (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ##     • No instance for (Semigroup Builder)
    ##         arising from the superclasses of an instance declaration
    ##     • In the instance declaration for ‘Monoid Builder’
    src = pkgs.fetchFromGitHub {
      owner  = "sol";
      repo   = "stringbuilder";
      rev    = "4a1b689d3c8a462b28e0d21224b96165f622e6f7";
      sha256 = "0h3nva4mwxkdg7hh7b7a3v561wi1bvmj0pshhd3sl7dy3lpvnrah";
    };
  });

  th-desugar = overrideCabal super.th-desugar (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ##     • Could not deduce (MonadIO (DsM q))
    ##         arising from the 'deriving' clause of a data type declaration
    ##       from the context: Quasi q
    src = pkgs.fetchFromGitHub {
      owner  = "goldfirere";
      repo   = "th-desugar";
      rev    = "4ca98c6492015e6ad063d3ad1a2ad6c4f0a56837";
      sha256 = "1n3myd3gia9qsgdvrwqa023d3g7wkrhyv0wc8czwzz0lj9xzh7lw";
    };
  });

  unordered-containers = overrideCabal super.unordered-containers (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ##     Module ‘Data.Semigroup’ does not export ‘Monoid(..)’
    ##    |
    ## 80 | import Data.Semigroup (Semigroup(..), Monoid(..))
    src = pkgs.fetchFromGitHub {
      owner  = "tibbe";
      repo   = "unordered-containers";
      rev    = "0a6b84ec103e28b73458f385ef846a7e2d3ea42f";
      sha256 = "128q8k4py2wr1v0gmyvqvzikk6sksl9aqj0lxzf46763lis8x9my";
    };
  });

  websockets = overrideCabal super.websockets (drv: {
    ## Upstreamed, awaiting a Hackage release
    ## 
    ##     • No instance for (Semigroup SizeLimit)
    ##         arising from the superclasses of an instance declaration
    ##     • In the instance declaration for ‘Monoid SizeLimit’
    src = pkgs.fetchFromGitHub {
      owner  = "jaspervdj";
      repo   = "websockets";
      rev    = "11ba6d15cf47bace1936b13a58192e37908b0300";
      sha256 = "1swphhnqvs5kh0wlqpjjgx9q91yxi6lasid8akdxp3gqll5ii2hf";
    };
  });


  ## Unmerged

  blaze-builder = overrideCabal super.blaze-builder (drv: {
    ## Unmerged.  PR: https://github.com/lpsmith/blaze-builder/pull/10
    ## 
    ##     • No instance for (Semigroup Poke)
    ##         arising from the superclasses of an instance declaration
    ##     • In the instance declaration for ‘Monoid Poke’
    src = pkgs.fetchFromGitHub {
      owner  = "bgamari";
      repo   = "blaze-builder";
      rev    = "b7195f160795a081adbb9013810d843f1ba5e062";
      sha256 = "1g351fdpsvn2lbqiy9bg2s0wwrdccb8q1zh7gvpsx5nnj24b1c00";
    };
  });

  bytestring-trie = overrideCabal super.bytestring-trie (drv: {
    ## Unmerged.  PR: https://github.com/wrengr/bytestring-trie/pull/3
    ## 
    ##     • Could not deduce (Semigroup (Trie a))
    ##         arising from the superclasses of an instance declaration
    ##       from the context: Monoid a
    src = pkgs.fetchFromGitHub {
      owner  = "RyanGlScott";
      repo   = "bytestring-trie";
      rev    = "e0ae0cb1ad40dedd560090d69cc36f9760797e29";
      sha256 = "1jkdchvrca7dgpij5k4h1dy4qr1rli3fzbsqajwxmx9865rgiksl";
    };
    ## Setup: Encountered missing dependencies:
    ## HUnit >=1.3.1.1 && <1.7,
    ## QuickCheck >=2.4.1 && <2.11,
    ## lazysmallcheck ==0.6.*,
    ## smallcheck >=1.1.1 && <1.2
    doCheck         = false;
    ## Setup: Encountered missing dependencies:
    ## data-or ==1.0.*
    ## builder for ‘/nix/store/iw3xsljnygsv9q2jglcv54mqd94fig7n-bytestring-trie-0.2.4.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/iw3xsljnygsv9q2jglcv54mqd94fig7n-bytestring-trie-0.2.4.1.drv’ failed
    libraryHaskellDepends = drv.libraryHaskellDepends ++ [ self.data-or ];
  });

  gtk2hs-buildtools = overrideCabal super.gtk2hs-buildtools (drv: {
    ## Unmerged.  PR: https://github.com/gtk2hs/gtk2hs/pull/233
    ## 
    ## /nix/store/78sxg2kvl2klplqfx22s6b42lds7qq23-stdenv/setup: line 99: cd: tools: No such file or directory
    src = pkgs.fetchFromGitHub {
      owner  = "deepfire";
      repo   = "gtk2hs";
      rev    = "08c68d5afc22dd5761ec2c92ebf49c6d252e545b";
      sha256 = "06prn5wqq8x225n9wlbyk60f50jyjj8fm2hf181dyqjpf8wq75xa";
    };
    ## Setup: No cabal file found.
    prePatch        = "cd tools; ";
  });

  hashtables = overrideCabal super.hashtables (drv: {
    ## Unmerged.  PR: https://github.com/gregorycollins/hashtables/pull/46
    ## 
    ##     • No instance for (Semigroup Slot)
    ##         arising from the superclasses of an instance declaration
    ##     • In the instance declaration for ‘Monoid Slot’
    src = pkgs.fetchFromGitHub {
      owner  = "deepfire";
      repo   = "hashtables";
      rev    = "b9eb4b10a50bd6250330422afecc065339a32412";
      sha256 = "0l4nplpvnzzf397zyh7j2k6yiqb46k6bdy00m4zzvhlfp7p1xkaw";
    };
  });

  language-c = overrideCabal super.language-c (drv: {
    ## Unmerged.  PR: https://github.com/visq/language-c/pull/45
    ## 
    ##     Ambiguous occurrence ‘<>’
    ##     It could refer to either ‘Prelude.<>’,
    ##                              imported from ‘Prelude’ at src/Language/C/Pretty.hs:15:8-24
    src = pkgs.fetchFromGitHub {
      owner  = "deepfire";
      repo   = "language-c";
      rev    = "03b120c64c12946d134017f4922b55c6ab4f52f8";
      sha256 = "1mcv46fq37kkd20rhhdbn837han5knjdsgc7ckqp5r2r9m3vy89r";
    };
    ## /bin/sh: cabal: command not found
    doCheck         = false;
  });

  language-c_0_7_0 = overrideCabal super.language-c_0_7_0 (drv: {
    ## Unmerged.  PR: https://github.com/visq/language-c/pull/45
    ## 
    ##     Ambiguous occurrence ‘<>’
    ##     It could refer to either ‘Prelude.<>’,
    ##                              imported from ‘Prelude’ at src/Language/C/Pretty.hs:15:8-24
    src = pkgs.fetchFromGitHub {
      owner  = "deepfire";
      repo   = "language-c";
      rev    = "03b120c64c12946d134017f4922b55c6ab4f52f8";
      sha256 = "1mcv46fq37kkd20rhhdbn837han5knjdsgc7ckqp5r2r9m3vy89r";
    };
    ## /bin/sh: cabal: command not found
    doCheck         = false;
  });

  monadplus = overrideCabal super.monadplus (drv: {
    ## Unmerged.  PR: https://github.com/hanshoglund/monadplus/pull/3
    ## 
    ##     • No instance for (Semigroup (Partial a b))
    ##         arising from the superclasses of an instance declaration
    ##     • In the instance declaration for ‘Monoid (Partial a b)’
    src = pkgs.fetchFromGitHub {
      owner  = "asr";
      repo   = "monadplus";
      rev    = "aa09f2473e2c906f2707b8a3fdb0a087405fd6fb";
      sha256 = "0g37s3rih4i3vrn4kjwj12nq5lkpckmjw33xviva9gly2vg6p3xc";
    };
  });

  reflex = overrideCabal super.reflex (drv: {
    ## Unmerged.  PR: https://github.com/reflex-frp/reflex/pull/158
    ## 
    ##     • Could not deduce (Semigroup (Event t a))
    ##         arising from the superclasses of an instance declaration
    ##       from the context: (Semigroup a, Reflex t)
    src = pkgs.fetchFromGitHub {
      owner  = "deepfire";
      repo   = "reflex";
      rev    = "4fb50139db45a37493b91973eeaad9885b4c63ca";
      sha256 = "0i7pp6cw394m2vbwcqv9z5ngdarp01sabqr1jkkgchxdkkii94nx";
    };
    ##       mergeIncrementalWithMove ::
    ##         GCompare k =>
    ##         Incremental t (PatchDMapWithMove k (Event t))
    ##         -> Event t (DMap k Identity)
    ##       currentIncremental ::
    ##         Patch p => Incremental t p -> Behavior t (PatchTarget p)
    ##       updatedIncremental :: Patch p => Incremental t p -> Event t p
    ##       incrementalToDynamic ::
    ##         Patch p => Incremental t p -> Dynamic t (PatchTarget p)
    ##       behaviorCoercion ::
    ##         Coercion a b -> Coercion (Behavior t a) (Behavior t b)
    ##       eventCoercion :: Coercion a b -> Coercion (Event t a) (Event t b)
    ##       dynamicCoercion ::
    ##         Coercion a b -> Coercion (Dynamic t a) (Dynamic t b)
    ##       mergeIntIncremental ::
    ##         Incremental t (PatchIntMap (Event t a)) -> Event t (IntMap a)
    ##       fanInt :: Event t (IntMap a) -> EventSelectorInt t a
    ##       {-# MINIMAL never, constant, push, pushCheap, pull, merge, fan,
    ##                   switch, coincidence, current, updated, unsafeBuildDynamic,
    ##                   unsafeBuildIncremental, mergeIncremental, mergeIncrementalWithMove,
    ##                   currentIncremental, updatedIncremental, incrementalToDynamic,
    ##                   behaviorCoercion, eventCoercion, dynamicCoercion,
    ##                   mergeIntIncremental, fanInt #-}
    ## Matches:
    ##     []
    ## Call stack:
    ##     CallStack (from HasCallStack):
    ##       callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable
    ##       pprPanic, called at utils/haddock/haddock-api/src/Haddock/Interface/Create.hs:1013:16 in main:Haddock.Interface.Create
    ## Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
    doHaddock       = false;
    ## Setup: Encountered missing dependencies:
    ## base >=4.7 && <4.11, bifunctors >=5.2 && <5.5
    ## builder for ‘/nix/store/93ka24600m4mipsgn2cq8fwk124q97ca-reflex-0.4.0.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/93ka24600m4mipsgn2cq8fwk124q97ca-reflex-0.4.0.1.drv’ failed
    jailbreak       = true;
    ## Setup: Encountered missing dependencies:
    ## data-default -any,
    ## lens -any,
    ## monad-control -any,
    ## prim-uniq -any,
    ## reflection -any,
    libraryHaskellDepends = drv.libraryHaskellDepends ++ [ self.data-default self.haskell-src-exts self.lens self.monad-control self.prim-uniq self.reflection self.split self.template-haskell self.unbounded-delays ];
  });

  regex-tdfa = overrideCabal super.regex-tdfa (drv: {
    ## Unmerged.  PR: https://github.com/ChrisKuklewicz/regex-tdfa/pull/13
    ## 
    ##     • No instance for (Semigroup (CharMap a))
    ##         arising from the superclasses of an instance declaration
    ##     • In the instance declaration for ‘Monoid (CharMap a)’
    src = pkgs.fetchFromGitHub {
      owner  = "bgamari";
      repo   = "regex-tdfa";
      rev    = "34f4593a520176a917b74b8c7fcbbfbd72fb8178";
      sha256 = "1aiklvf08w1hx2jn9n3sm61mfvdx4fkabszkjliapih2yjpmi3hq";
    };
  });

  text-format = overrideCabal super.text-format (drv: {
    ## Unmerged.  PR: https://github.com/bos/text-format/pull/21
    ## 
    ##     • No instance for (Semigroup Format)
    ##         arising from the superclasses of an instance declaration
    ##     • In the instance declaration for ‘Monoid Format’
    src = pkgs.fetchFromGitHub {
      owner  = "deepfire";
      repo   = "text-format";
      rev    = "a1cda87c222d422816f956c7272e752ea12dbe19";
      sha256 = "0lyrx4l57v15rvazrmw0nfka9iyxs4wyaasjj9y1525va9s1z4fr";
    };
  });

  wl-pprint-text = overrideCabal super.wl-pprint-text (drv: {
    ## Unmerged.  PR: https://github.com/ivan-m/wl-pprint-text/pull/17
    ## 
    ##     Ambiguous occurrence ‘<>’
    ##     It could refer to either ‘PP.<>’,
    ##                              imported from ‘Prelude.Compat’ at Text/PrettyPrint/Leijen/Text/Monadic.hs:73:1-36
    src = pkgs.fetchFromGitHub {
      owner  = "deepfire";
      repo   = "wl-pprint-text";
      rev    = "615b83d1e5be52d1448aa1ab2517b431a617027b";
      sha256 = "1p67v9s878br0r152h4n37smqhkg78v8zxhf4qm6d035s4rzj76i";
    };
  });


  ## Non-code, configuration-only change

  adjunctions = overrideCabal super.adjunctions (drv: {
    ## Setup: Encountered missing dependencies:
    ## free ==4.*
    ## builder for ‘/nix/store/64pvqslahgby4jlg9rpz29n8w4njb670-adjunctions-4.3.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/64pvqslahgby4jlg9rpz29n8w4njb670-adjunctions-4.3.drv’ failed
    jailbreak       = true;
  });

  async = overrideCabal super.async (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.3 && <4.11
    ## builder for ‘/nix/store/2xf491hgsmckz2akrn765kvvy2k8crbd-async-2.1.1.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/2xf491hgsmckz2akrn765kvvy2k8crbd-async-2.1.1.1.drv’ failed
    jailbreak       = true;
  });

  bifunctors = overrideCabal super.bifunctors (drv: {
    ## Setup: Encountered missing dependencies:
    ## template-haskell >=2.4 && <2.13
    ## builder for ‘/nix/store/dy1hzdy14pz96cvx37yggbv6a88sgxq4-bifunctors-5.5.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/dy1hzdy14pz96cvx37yggbv6a88sgxq4-bifunctors-5.5.drv’ failed
    jailbreak       = true;
  });

  bindings-GLFW = overrideCabal super.bindings-GLFW (drv: {
    ## Setup: Encountered missing dependencies:
    ## template-haskell >=2.10 && <2.13
    ## builder for ‘/nix/store/ykc786r2bby5kkbpqjg0y10wb9jhmsa9-bindings-GLFW-3.1.2.3.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/ykc786r2bby5kkbpqjg0y10wb9jhmsa9-bindings-GLFW-3.1.2.3.drv’ failed
    jailbreak       = true;
  });

  bytes = overrideCabal super.bytes (drv: {
    ## CABAL-MISSING-DEPS
    ## Setup: Encountered missing dependencies:
    ## ghc >=7.0 && <8.4
    ## builder for ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed
    doCheck         = false;
  });

  cabal-doctest = overrideCabal super.cabal-doctest (drv: {
    ## Setup: Encountered missing dependencies:
    ## Cabal >=1.10 && <2.1, base >=4.3 && <4.11
    ## builder for ‘/nix/store/zy3l0ll0r9dq29lgxajv12rz1jzjdkrn-cabal-doctest-1.0.5.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/zy3l0ll0r9dq29lgxajv12rz1jzjdkrn-cabal-doctest-1.0.5.drv’ failed
    jailbreak       = true;
  });

  ChasingBottoms = overrideCabal super.ChasingBottoms (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.2 && <4.11
    ## builder for ‘/nix/store/wsyjjf4x6pmx84kxnjaka7zwakyrca03-ChasingBottoms-1.3.1.3.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/wsyjjf4x6pmx84kxnjaka7zwakyrca03-ChasingBottoms-1.3.1.3.drv’ failed
    jailbreak       = true;
  });

  comonad = overrideCabal super.comonad (drv: {
    ## CABAL-MISSING-DEPS
    ## Setup: Encountered missing dependencies:
    ## ghc >=7.0 && <8.4
    ## builder for ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed
    doCheck         = false;
  });

  distributive = overrideCabal super.distributive (drv: {
    ## CABAL-MISSING-DEPS
    ## Setup: Encountered missing dependencies:
    ## ghc >=7.0 && <8.4
    ## builder for ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed
    doCheck         = false;
  });

  exception-transformers = overrideCabal super.exception-transformers (drv: {
    ## Setup: Encountered missing dependencies:
    ## HUnit >=1.2 && <1.6
    ## builder for ‘/nix/store/qs4g7lzq1ixcgg5rw4xb5545g7r34md8-exception-transformers-0.4.0.5.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/qs4g7lzq1ixcgg5rw4xb5545g7r34md8-exception-transformers-0.4.0.5.drv’ failed
    jailbreak       = true;
  });

  hashable = overrideCabal super.hashable (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.4 && <4.11
    ## builder for ‘/nix/store/4qlxxypfhbwcv227cmsja1asgqnq37gf-hashable-1.2.6.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/4qlxxypfhbwcv227cmsja1asgqnq37gf-hashable-1.2.6.1.drv’ failed
    jailbreak       = true;
  });

  hashable-time = overrideCabal super.hashable-time (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.7 && <4.11
    ## builder for ‘/nix/store/38dllcgxpmkd2fgvs6wd7ji86py0wbnh-hashable-time-0.2.0.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/38dllcgxpmkd2fgvs6wd7ji86py0wbnh-hashable-time-0.2.0.1.drv’ failed
    jailbreak       = true;
  });

  haskell-src-meta = overrideCabal super.haskell-src-meta (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.6 && <4.11, template-haskell >=2.8 && <2.13
    ## builder for ‘/nix/store/g5wkb14sydvyv484agvaa7hxl84a0wr9-haskell-src-meta-0.8.0.2.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/g5wkb14sydvyv484agvaa7hxl84a0wr9-haskell-src-meta-0.8.0.2.drv’ failed
    jailbreak       = true;
  });

  hspec-meta = overrideCabal super.hspec-meta (drv: {
    ## Linking dist/build/hspec-meta-discover/hspec-meta-discover ...
    ## running tests
    ## Package has no test suites.
    ## haddockPhase
    ## Running hscolour for hspec-meta-2.4.6...
    ## Preprocessing library for hspec-meta-2.4.6..
    ## Preprocessing executable 'hspec-meta-discover' for hspec-meta-2.4.6..
    ## Preprocessing library for hspec-meta-2.4.6..
    ## Running Haddock on library for hspec-meta-2.4.6..
    ## Haddock coverage:
    ## haddock: panic! (the 'impossible' happened)
    ##   (GHC version 8.4.20180122 for x86_64-unknown-linux):
    ## 	extractDecl
    ## Ambiguous decl for Arg in class:
    ##     class Example e where
    ##       type Arg e
    ##       type Arg e = ()
    ##       evaluateExample ::
    ##         e
    ##         -> Params
    ##            -> (ActionWith (Arg e) -> IO ()) -> ProgressCallback -> IO Result
    ##       {-# MINIMAL evaluateExample #-}
    ## Matches:
    ##     []
    ## Call stack:
    ##     CallStack (from HasCallStack):
    ##       callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable
    ##       pprPanic, called at utils/haddock/haddock-api/src/Haddock/Interface/Create.hs:1013:16 in main:Haddock.Interface.Create
    ## Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
    doHaddock       = false;
  });

  integer-logarithms = overrideCabal super.integer-logarithms (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.3 && <4.11
    ## builder for ‘/nix/store/zdiicv0jmjsw6bprs8wxxaq5m0z0a75f-integer-logarithms-1.0.2.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/zdiicv0jmjsw6bprs8wxxaq5m0z0a75f-integer-logarithms-1.0.2.drv’ failed
    jailbreak       = true;
  });

  kan-extensions = overrideCabal super.kan-extensions (drv: {
    ## Setup: Encountered missing dependencies:
    ## free ==4.*
    ## builder for ‘/nix/store/kvnlcj6zdqi2d2yq988l784hswjwkk4c-kan-extensions-5.0.2.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/kvnlcj6zdqi2d2yq988l784hswjwkk4c-kan-extensions-5.0.2.drv’ failed
    jailbreak       = true;
  });

  keys = overrideCabal super.keys (drv: {
    ## Setup: Encountered missing dependencies:
    ## free ==4.*
    ## builder for ‘/nix/store/khkbn7wmjr10nyq0wwkmn888bj1l4fmh-keys-3.11.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/khkbn7wmjr10nyq0wwkmn888bj1l4fmh-keys-3.11.drv’ failed
    jailbreak       = true;
  });

  lambdacube-gl = overrideCabal super.lambdacube-gl (drv: {
    ## Setup: Encountered missing dependencies:
    ## vector ==0.11.*
    ## builder for ‘/nix/store/a98830jm4yywfg1d6264p4yngbiyvssp-lambdacube-gl-0.5.2.4.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/a98830jm4yywfg1d6264p4yngbiyvssp-lambdacube-gl-0.5.2.4.drv’ failed
    jailbreak       = true;
  });

  lifted-async = overrideCabal super.lifted-async (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.5 && <4.11
    ## builder for ‘/nix/store/l3000vil24jyq66a5kfqvxfdmy7agwic-lifted-async-0.9.3.3.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/l3000vil24jyq66a5kfqvxfdmy7agwic-lifted-async-0.9.3.3.drv’ failed
    jailbreak       = true;
  });

  linear = overrideCabal super.linear (drv: {
    ## CABAL-MISSING-DEPS
    ## Setup: Encountered missing dependencies:
    ## ghc >=7.0 && <8.4
    ## builder for ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed
    doCheck         = false;
  });

  newtype-generics = overrideCabal super.newtype-generics (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.6 && <4.11
    ## builder for ‘/nix/store/l3rzsjbwys4rjrpv1703iv5zwbd4bwy6-newtype-generics-0.5.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/l3rzsjbwys4rjrpv1703iv5zwbd4bwy6-newtype-generics-0.5.1.drv’ failed
    jailbreak       = true;
  });

  parallel = overrideCabal super.parallel (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.3 && <4.11
    ## builder for ‘/nix/store/c16gcgn7d7gql8bbjqngx7wbw907hnwb-parallel-3.2.1.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/c16gcgn7d7gql8bbjqngx7wbw907hnwb-parallel-3.2.1.1.drv’ failed
    jailbreak       = true;
  });

  quickcheck-instances = overrideCabal super.quickcheck-instances (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.5 && <4.11
    ## builder for ‘/nix/store/r3fx9f7ksp41wfn6cp4id3mzgv04pwij-quickcheck-instances-0.3.16.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/r3fx9f7ksp41wfn6cp4id3mzgv04pwij-quickcheck-instances-0.3.16.1.drv’ failed
    jailbreak       = true;
  });

  tasty-ant-xml = overrideCabal super.tasty-ant-xml (drv: {
    ## Setup: Encountered missing dependencies:
    ## tasty >=0.10 && <1.0
    ## builder for ‘/nix/store/86dlb96cdw9jpq95xbndf4axj1z542d6-tasty-ant-xml-1.1.2.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/86dlb96cdw9jpq95xbndf4axj1z542d6-tasty-ant-xml-1.1.2.drv’ failed
    jailbreak       = true;
  });

  tasty-expected-failure = overrideCabal super.tasty-expected-failure (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.5 && <4.11
    ## builder for ‘/nix/store/gdm01qb8ppxgrl6dgzhlj8fzmk4x8dj3-tasty-expected-failure-0.11.0.4.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/gdm01qb8ppxgrl6dgzhlj8fzmk4x8dj3-tasty-expected-failure-0.11.0.4.drv’ failed
    jailbreak       = true;
  });

  tasty-hedgehog = overrideCabal super.tasty-hedgehog (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.8 && <4.11, tasty ==0.11.*
    ## builder for ‘/nix/store/bpxyzzbmb03n88l4xz4k2rllj4227fwv-tasty-hedgehog-0.1.0.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/bpxyzzbmb03n88l4xz4k2rllj4227fwv-tasty-hedgehog-0.1.0.1.drv’ failed
    jailbreak       = true;
  });

  text-lens = overrideCabal super.text-lens (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.9.0.0 && <4.10,
    ## extra >=1.4.10 && <1.5,
    ## hspec >=2.2.4 && <2.3,
    ## lens ==4.14.*
    jailbreak       = true;
  });

  th-abstraction = overrideCabal super.th-abstraction (drv: {
    ## Setup: Encountered missing dependencies:
    ## template-haskell >=2.5 && <2.13
    ## builder for ‘/nix/store/la3zdphp3nqzl590n25zyrgj62ga8cl6-th-abstraction-0.2.6.0.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/la3zdphp3nqzl590n25zyrgj62ga8cl6-th-abstraction-0.2.6.0.drv’ failed
    jailbreak       = true;
  });

  these = overrideCabal super.these (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.5 && <4.11
    ## builder for ‘/nix/store/1wwqq67pinjj95fgqg13bchh0kbyrb83-these-0.7.4.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/1wwqq67pinjj95fgqg13bchh0kbyrb83-these-0.7.4.drv’ failed
    jailbreak       = true;
  });

  trifecta = overrideCabal super.trifecta (drv: {
    ## CABAL-MISSING-DEPS
    ## Setup: Encountered missing dependencies:
    ## ghc >=7.0 && <8.4
    ## builder for ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/yklyv4lw4d02316p31x7a2pni1z6gjgk-doctest-0.13.0.drv’ failed
    doCheck         = false;
  });

  unliftio-core = overrideCabal super.unliftio-core (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.5 && <4.11
    ## builder for ‘/nix/store/bn8w06wlq7zzli0858hfwlai7wbj6dmq-unliftio-core-0.1.1.0.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/bn8w06wlq7zzli0858hfwlai7wbj6dmq-unliftio-core-0.1.1.0.drv’ failed
    jailbreak       = true;
  });

  vector-algorithms = overrideCabal super.vector-algorithms (drv: {
    ##     • Ambiguous type variable ‘mv0’
    doCheck         = false;
  });

  wavefront = overrideCabal super.wavefront (drv: {
    ## Setup: Encountered missing dependencies:
    ## base >=4.8 && <4.11
    ## builder for ‘/nix/store/iy6ccxh4dvp6plalx4ww81qrnhxm7jgr-wavefront-0.7.1.1.drv’ failed with exit code 1
    ## error: build of ‘/nix/store/iy6ccxh4dvp6plalx4ww81qrnhxm7jgr-wavefront-0.7.1.1.drv’ failed
    jailbreak       = true;
  });

  # Needed for (<>) in prelude
  funcmp = super.funcmp_1_9;

  # https://github.com/haskell-hvr/deepseq-generics/pull/4
  deepseq-generics = doJailbreak super.deepseq-generics;

  # SMP compat
  # https://github.com/vincenthz/hs-securemem/pull/12
  securemem =
    let patch = pkgs.fetchpatch
          { url = https://github.com/vincenthz/hs-securemem/commit/6168d90b00bfc6a559d3b9160732343644ef60fb.patch;
            sha256 = "0pfjmq57kcvxq7mhljd40whg2g77vdlvjyycdqmxxzz1crb6pipf";
          };
    in appendPatch super.securemem patch;
}