1 files changed, 6 insertions, 16 deletions
diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix
index 6ea2db37d21d..f73172e02d38 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix
@@ -36,6 +36,12 @@ self: super: {
   unix = null;
   xhtml = null;
 
+  # These are now core libraries in GHC 8.4.x.
+  mtl = self.mtl_2_2_2;
+  parsec = self.parsec_3_1_13_0;
+  stm = self.stm_2_4_5_0;
+  text = self.text_1_2_3_0;
+
   # Make sure we can still build Cabal 1.x.
   Cabal_1_24_2_0 = overrideCabal super.Cabal_1_24_2_0 (drv: {
     prePatch = "sed -i -e 's/process.*< 1.5,/process,/g' Cabal.cabal";
@@ -50,10 +56,6 @@ self: super: {
     sha256 = "026vv2k3ks73jngwifszv8l59clg88pcdr4mz0wr0gamivkfa1zy";
   });
 
-  # http://hub.darcs.net/dolio/vector-algorithms/issue/9#comment-20170112T145715
-  vector-algorithms = dontCheck super.vector-algorithms;
-
-
   # https://github.com/nominolo/ghc-syb/issues/20
   ghc-syb-utils = dontCheck super.ghc-syb-utils;
 
@@ -94,16 +96,4 @@ self: super: {
     haddock-library = dontHaddock (dontCheck self.haddock-library_1_5_0_1);
   }));
 
-  # Hledger depends indirectly on different versions of base-compat. The
-  # override can probably be removed once we update to LTS 12.x.
-  hledger-lib = super.hledger-lib.overrideScope (self: super: { base-compat = self.base-compat_0_10_4; });
-  hledger = super.hledger.overrideScope (self: super: {
-    base-compat = self.base-compat_0_10_4;
-    aeson = self.aeson_1_4_0_0;
-  });
-  hledger-web = super.hledger-web.overrideScope (self: super: {
-    base-compat = self.base-compat_0_10_4;
-    aeson = self.aeson_1_4_0_0;
-  });
-
 }