diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
index d120dc8d0b3c..24502fe476eb 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
@@ -47,37 +47,47 @@ self: super: {
   # LTS-12.x versions do not compile.
   base-orphans = self.base-orphans_0_8;
   contravariant = self.contravariant_1_5;
-  control-monad-free = markBrokenVersion "0.6.1" super.control-monad-free;
   free = self.free_5_1;
-  Glob = self.Glob_0_9_3;
-  haddock-library = markBroken super.haddock-library;
-  hslogger = self.hslogger_1_2_12;
+  haddock-library = dontCheck super.haddock-library_1_7_0;
+  hpack = self.hpack_0_31_0;
   hspec = self.hspec_2_5_8;
   hspec-core = self.hspec-core_2_5_8;
-  hspec-core_2_5_8 = super.hspec-core_2_5_8.overrideScope (self: super: { QuickCheck = self.QuickCheck_2_12_6_1; });
   hspec-discover = self.hspec-discover_2_5_8;
   hspec-meta = self.hspec-meta_2_5_6;
-  hspec-meta_2_5_6 = super.hspec-meta_2_5_6.overrideScope (self: super: { QuickCheck = self.QuickCheck_2_12_6_1; });
-  JuicyPixels = self.JuicyPixels_3_3_1;
+  JuicyPixels = self.JuicyPixels_3_3_2;
   lens = self.lens_4_17;
-  polyparse = markBrokenVersion "1.12" super.polyparse;
+  megaparsec = dontCheck super.megaparsec_7_0_1;
+  neat-interpolation = self.neat-interpolation_0_3_2_4;
+  patience = markBrokenVersion "0.1.1" super.patience;
   primitive = self.primitive_0_6_4_0;
+  QuickCheck = self.QuickCheck_2_12_6_1;
   semigroupoids = self.semigroupoids_5_3_1;
   tagged = self.tagged_0_8_6;
-  unordered-containers = dontCheck super.unordered-containers;
+  yaml = self.yaml_0_11_0_0;
 
-  # Over-specified constraints.
-  async = doJailbreak super.async;                           # base >=4.3 && <4.12, stm >=2.2 && <2.5
-  ChasingBottoms = doJailbreak super.ChasingBottoms;         # base >=4.2 && <4.12, containers >=0.3 && <0.6
-  hashable = doJailbreak super.hashable;                     # base >=4.4 && <4.1
-  hashable-time = doJailbreak super.hashable-time;           # base >=4.7 && <4.12
-  integer-logarithms = doJailbreak super.integer-logarithms; # base >=4.3 && <4.12
-  optparse-applicative = doJailbreak super.optparse-applicative;   # https://github.com/pcapriotti/optparse-applicative/issues/319
-  tar = doJailbreak super.tar;                               # containers >=0.2 && <0.6
-  test-framework = doJailbreak super.test-framework;         # containers >=0.1 && <0.6
+  # https://github.com/tibbe/unordered-containers/issues/214
+  unordered-containers = dontCheck super.unordered-containers;
 
   # https://github.com/haskell/fgl/issues/79
   # https://github.com/haskell/fgl/issues/81
   fgl = appendPatch super.fgl ./patches/fgl-monad-fail.patch;
 
+  # Test suite does not compile.
+  cereal = dontCheck super.cereal;
+  Diff = dontCheck super.Diff;
+  http-api-data = doJailbreak super.http-api-data;
+  persistent-sqlite = dontCheck super.persistent-sqlite;
+  psqueues = dontCheck super.psqueues;    # won't cope with QuickCheck 2.12.x
+  system-fileio = dontCheck super.system-fileio;  # avoid dependency on broken "patience"
+  unicode-transforms = dontCheck super.unicode-transforms;
+
+  # https://github.com/bmillwood/haskell-src-meta/pull/80
+  haskell-src-meta = doJailbreak super.haskell-src-meta;
+
+  # The official 1.12 release is broken and unmaintained.
+  polyparse = appendPatch (overrideCabal super.polyparse (drv: { editedCabalFile = null; })) (pkgs.fetchpatch {
+    url = https://github.com/bergmark/polyparse/commit/8a69ee7e57db798c106d8b56dce05b1dfc4fed37.patch;
+    sha256 = "11r73wx1w6bfrkrnk6r9k7rfzp6qrvkdikb2by37ld06c0w6nn57";
+  });
+
 }
diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index e1fd8d13285f..590f7f0d9719 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -543,4 +543,8 @@ self: super: builtins.intersectAttrs super {
           --set NIX_CFLAGS_LINK "-L${ocl-icd}/lib"
       '';
     });
+
+  # The test suite has undeclared dependencies on git.
+  githash = dontCheck super.githash;
+
 }