haskellPackages.{hackage-db,distribution-nixpkgs}: new rel. bounds

* no released version of hackage2nix does support distribution-nixpkgs yet.

* hackage-db 2.1.2 fixes an annoying bug introduced in 2.1.1 and also supports
  Cabal 3.4: https://github.com/NixOS/cabal2nix/issues/501

pkgs/development/haskell-modules/configuration-common.nix

@@ -1869,8 +1869,6 @@ EOT
   # https://github.com/HeinrichApfelmus/reactive-banana/issues/215
   reactive-banana = doJailbreak super.reactive-banana;
 
-  hackage-db_2_1_0 = doDistribute super.hackage-db_2_1_0;
-
   # Too strict bounds on QuickCheck
   # https://github.com/muesli4/table-layout/issues/16
   table-layout = doJailbreak super.table-layout;

pkgs/development/haskell-modules/configuration-ghc-8.10.x.nix

@@ -84,8 +84,4 @@ self: super: {
       executableHaskellDepends = drv.executableToolDepends or [] ++ [ self.repline ];
     }));
 
-  # hackage-db 2.1.1 is incompatible with Cabal < 3.4
-  # See https://github.com/NixOS/cabal2nix/issues/501
-  hackage-db = self.hackage-db_2_1_0;
-
 }

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

@@ -106,8 +106,4 @@ self: super: {
   # https://github.com/haskellari/time-compat/issues/23
   time-compat = dontCheck super.time-compat;
 
-  # hackage-db 2.1.1 is incompatible with Cabal < 3.4
-  # See https://github.com/NixOS/cabal2nix/issues/501
-  hackage-db = super.hackage-db_2_1_0;
-
 }

pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix

@@ -136,7 +136,4 @@ self: super: {
   # vector 0.12.2 indroduced doctest checks that don‘t work on older compilers
   vector = dontCheck super.vector;
 
-  # hackage-db 2.1.1 is incompatible with Cabal < 3.4
-  # See https://github.com/NixOS/cabal2nix/issues/501
-  hackage-db = super.hackage-db_2_1_0;
 }

pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml

@@ -87,6 +87,7 @@ default-package-overrides:
   - diagrams-lib < 1.4.4
   # streamly-bytestring 0.1.3 needs streamly 0.8.0 which is not included in our stackage snapshot
   - streamly-bytestring == 0.1.2
+  - distribution-nixpkgs < 1.6.0        # 2021-07-26: required until cabal2nix 2.17.1 is released
 
 extra-packages:
   - base16-bytestring < 1               # required for cabal-install etc.
@@ -113,7 +114,6 @@ extra-packages:
   - sbv == 7.13                         # required for pkgs.petrinizer
   - crackNum < 3.0                      # 2021-05-21: 3.0 removed the lib which sbv 7.13 uses
   - ShellCheck == 0.7.1                 # 2021-05-09: haskell-ci 0.12.1 pins this version
-  - hackage-db < 2.1.1                  # 2021-06-10: Need older hackage-db as long as Cabal < 3.4, see https://github.com/NixOS/cabal2nix/issues/501
 
 package-maintainers:
   abbradar: