ghc-8.6.x: create an initial package set configuration

pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix

@@ -23,7 +23,6 @@ self: super: {
   ghc-prim = null;
   ghci = null;
   haskeline = null;
-  hoopl = self.hoopl_3_10_2_2;   # no longer a core library in GHC 8.4.x
   hpc = null;
   integer-gmp = null;
   mtl = null;
@@ -40,6 +39,9 @@ self: super: {
   unix = null;
   xhtml = null;
 
+  # Use to be a core-library, but no longer is since GHC 8.4.x.
+  hoopl = self.hoopl_3_10_2_2;
+
   doctest = dontCheck super.doctest_0_16_0;  # tests depend on very recent QuickCheck
   hackage-db = super.hackage-db_2_0_1;
 

pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix

@@ -0,0 +1,47 @@
+{ pkgs, haskellLib }:
+
+with haskellLib;
+
+self: super: {
+
+  # Use the latest LLVM.
+  inherit (pkgs) llvmPackages;
+
+  # Disable GHC 8.6.x core libraries.
+  array = null;
+  base = null;
+  binary = null;
+  bytestring = null;
+  Cabal = null;
+  containers = null;
+  deepseq = null;
+  directory = null;
+  filepath = null;
+  ghc-boot = null;
+  ghc-boot-th = null;
+  ghc-compact = null;
+  ghc-heap = null;
+  ghc-prim = null;
+  ghci = null;
+  haskeline = null;
+  hpc = null;
+  integer-gmp = null;
+  libiserv = null;
+  mtl = null;
+  parsec = null;
+  pretty = null;
+  process = null;
+  rts = null;
+  stm = null;
+  template-haskell = null;
+  terminfo = null;
+  text = null;
+  time = null;
+  transformers = null;
+  unix = null;
+  xhtml = null;
+
+  # Use to be a core-library, but no longer is since GHC 8.4.x.
+  hoopl = self.hoopl_3_10_2_2;
+
+}

pkgs/top-level/haskell-packages.nix

@@ -156,6 +156,11 @@ in rec {
       ghc = bh.compiler.ghc843;
       compilerConfig = callPackage ../development/haskell-modules/configuration-ghc-8.4.x.nix { };
     };
+    ghc861 = callPackage ../development/haskell-modules {
+      buildHaskellPackages = bh.packages.ghc861;
+      ghc = bh.compiler.ghc861;
+      compilerConfig = callPackage ../development/haskell-modules/configuration-ghc-8.6.x.nix { };
+    };
     ghcHEAD = callPackage ../development/haskell-modules {
       buildHaskellPackages = bh.packages.ghcHEAD;
       ghc = bh.compiler.ghcHEAD;