darcs: build using GHC 9.4

Darcs doesn't support unix >= 2.8.

pkgs/development/haskell-modules/configuration-ghc-9.4.x.nix

@@ -100,6 +100,9 @@ in {
   # https://github.com/kowainik/relude/issues/436
   relude = dontCheck super.relude;
 
+  # Broken because of unix >= 2.8 for GHC >= 9.6
+  darcs = unmarkBroken (doDistribute super.darcs);
+
   inherit
     (
       let

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

@@ -1042,6 +1042,7 @@ broken-packages:
   - Dao # failure in job https://hydra.nixos.org/build/233207745 at 2023-09-02
   - dao # failure in job https://hydra.nixos.org/build/233240654 at 2023-09-02
   - dap # failure in job https://hydra.nixos.org/build/237239767 at 2023-10-21
+  - darcs # doesn't support unix >= 2.8, 2024-01-13
   - darcs2dot # failure in job https://hydra.nixos.org/build/233209236 at 2023-09-02
   - darcs-buildpackage # failure in job https://hydra.nixos.org/build/233213566 at 2023-09-02
   - darcs-cabalized # failure in job https://hydra.nixos.org/build/233234765 at 2023-09-02

pkgs/development/haskell-modules/hackage-packages.nix

@@ -79127,7 +79127,9 @@ self: {
        '';
        description = "a distributed, interactive, smart revision control system";
        license = lib.licenses.gpl2Plus;
+       hydraPlatforms = lib.platforms.none;
        mainProgram = "darcs";
+       broken = true;
      }) {};
 
   "darcs-benchmark" = callPackage

pkgs/top-level/all-packages.nix

@@ -31017,7 +31017,7 @@ with pkgs;
 
   darcs = haskell.lib.compose.overrideCabal (drv: {
     configureFlags = (lib.remove "-flibrary" drv.configureFlags or []) ++ ["-f-library"];
-  }) (haskell.lib.compose.justStaticExecutables haskellPackages.darcs);
+  }) (haskell.lib.compose.justStaticExecutables haskell.packages.ghc94.darcs);
 
   darkman = callPackage ../applications/misc/darkman { };