release{,-8.6}.nix: update for 19.03

release-8.6.nix

-let
-  overlay = sel: sup: {
-    haskell = sup.haskell // {
-      packages = sup.haskell.packages // {
-        ghc862 = sup.haskell.packages.ghc862.override {
-          overrides = self: super: {
-            base-orphans           = self.callHackage "base-orphans" "0.8" {};
-            contravariant          = self.callHackage "contravariant" "1.5" {};
-            doctest                = sel.haskell.lib.dontCheck (self.callHackage "doctest" "0.16.0.1" {});
-            entropy                = self.callHackage "entropy" "0.4.1.3" {};
-            foldl                  = self.callHackage "foldl" "1.4.5" {};
-            haskell-src-exts       = self.callHackage "haskell-src-exts" "1.20.3" {};
-            haskell-src-meta       = sel.haskell.lib.doJailbreak super.haskell-src-meta;
-            hspec-core             = sel.haskell.lib.dontCheck super.hspec-core;
-            lifted-async           = self.callHackage "lifted-async" "0.10.0.3" {};
-            memory                 = self.callHackage "memory" "0.14.18" {};
-            polyparse              = self.callHackage "polyparse" "1.12.1" {};
-            quickcheck-instances   = self.callHackage "quickcheck-instances" "0.3.19" {};
-            semigroupoids          = self.callHackage "semigroupoids" "5.3.1" {};
-            system-fileio          = sel.haskell.lib.dontCheck super.system-fileio;
-            tasty-expected-failure = sel.haskell.lib.doJailbreak super.tasty-expected-failure;
-            th-expand-syns         = sel.haskell.lib.doJailbreak super.th-expand-syns;
-            unliftio-core          = self.callHackage "unliftio-core" "0.1.2.0" {};
-            unliftio               = self.callHackage "unliftio" "0.2.8.1" {};
-            unordered-containers   = sel.haskell.lib.dontCheck super.unordered-containers;
-          };
-        };
-      };
-    };
-  };
-in
-{ compiler ? "ghc862"
-, nixpkgs ? import <nixpkgs> { overlays = [ overlay ]; }
+{ compiler ? "ghc864"
+, nixpkgs ? import <nixpkgs> {}
 , packages ? (_: [])
 , pythonPackages ? (_: [])
 , rtsopts ? "-M3g -N2"

release.nix

@@ -45,10 +45,11 @@ let
       });
       ghc-parser        = self.callCabal2nix "ghc-parser" ghc-parser-src {};
       ipython-kernel    = self.callCabal2nix "ipython-kernel" ipython-kernel-src {};
+      zeromq4-haskell   = self.callHackage "zeromq4-haskell" "0.8.0" {};
 
+      haskell-src-exts  = self.haskell-src-exts_1_21_0;
       inline-r          = nixpkgs.haskell.lib.dontCheck super.inline-r;
       static-canvas     = nixpkgs.haskell.lib.doJailbreak super.static-canvas;
-      zeromq4-haskell   = nixpkgs.haskell.lib.dontCheck super.zeromq4-haskell;
     } // displays self);
   });
   ihaskellEnv = haskellPackages.ghcWithPackages (self: [ self.ihaskell ] ++ packages self);