remove unnecessary overrides

nix/overlays/haskell.nix

@@ -11,14 +11,12 @@ let
             overrides =
               with superPkgs.lib.attrsets;
               with superPkgs.haskell.lib;
-              self: super: {
-
-                monoidal-containers = self.callPackage ./haskell/monoidal-containers.nix {};
-                streaming-process = doJailbreak (self.callPackage ./haskell/streaming-process.nix {});
-
-              };
+              self: super: {};
           }
     ) super.haskell.packages;
   };
 in
-{ inherit haskell; }
+{
+  inherit haskell;
+  #haskellPackages = self.haskell.packages.ghc881;
+}

nix/overlays/haskell/monoidal-containers.nix

@@ -1,16 +0,0 @@
-{ mkDerivation, aeson, base, containers, deepseq, hashable, lens
-, newtype, semialign, semigroups, stdenv, these
-, unordered-containers
-}:
-mkDerivation {
-  pname = "monoidal-containers";
-  version = "0.6.0.1";
-  sha256 = "02c9c21422bc2557bdea63854991604eab39289114125cb51c936fed8176b5c8";
-  libraryHaskellDepends = [
-    aeson base containers deepseq hashable lens newtype semialign
-    semigroups these unordered-containers
-  ];
-  homepage = "http://github.com/bgamari/monoidal-containers";
-  description = "Containers with monoidal accumulation";
-  license = stdenv.lib.licenses.bsd3;
-}

nix/overlays/haskell/streaming-process.nix

@@ -1,22 +0,0 @@
-{ mkDerivation, base, bytestring, directory, exceptions, hspec
-, lifted-async, monad-control, process, QuickCheck
-, quickcheck-instances, stdenv, streaming, streaming-bytestring
-, streaming-commons, streaming-concurrency, streaming-with
-, transformers, transformers-base
-}:
-mkDerivation {
-  pname = "streaming-process";
-  version = "0.1.0.0";
-  sha256 = "12a80a3648f68a0700d58108d5ab511f5d97b5e1fe994d3ac79fe0fc2f221060";
-  libraryHaskellDepends = [
-    base bytestring directory exceptions lifted-async monad-control
-    process streaming streaming-bytestring streaming-commons
-    streaming-concurrency streaming-with transformers transformers-base
-  ];
-  testHaskellDepends = [
-    base bytestring hspec QuickCheck quickcheck-instances streaming
-    streaming-bytestring
-  ];
-  description = "Streaming support for running system process";
-  license = stdenv.lib.licenses.mit;
-}