Add ghc 8.10.3 (#980)

ci.nix

@@ -27,8 +27,8 @@
     } // nixpkgs.lib.optionalAttrs (nixpkgsName == "R2009") {
       ghc883 = false;
       ghc884 = true;
-      ghc8101 = false;
-      ghc8102 = true;
+      ghc8102 = false;
+      ghc8103 = true;
       ghc810220201118 = false;
     });
   systems = nixpkgs: nixpkgs.lib.filterAttrs (_: v: builtins.elem v supportedSystems) {
@@ -43,7 +43,7 @@
     in lib.optionalAttrs (nixpkgsName == "R2009" && (__elem compiler-nix-name ["ghc865" "ghc884"])) {
     inherit (lib.systems.examples) ghcjs;
   } // lib.optionalAttrs (system == "x86_64-linux" && (
-         (nixpkgsName == "R2009" && __elem compiler-nix-name ["ghc8101" "ghc8102" "ghc810220201118"])
+         (nixpkgsName == "R2009" && __elem compiler-nix-name ["ghc8101" "ghc8102" "ghc8103" "ghc810220201118"])
       || (nixpkgsName == "R2003" && __elem compiler-nix-name ["ghc865"]))) {
     # Windows cross compilation is currently broken on macOS
     inherit (lib.systems.examples) mingwW64;

lib/ghcjs-project.nix

@@ -35,7 +35,16 @@
     version = "3.2.5";
     materialized = ../materialized/ghcjs/alex + "/${compiler-nix-name}";
   }
-, cabal-install ? pkgs.haskell-nix.cabal-install.${compiler-nix-name}
+, cabal-install ? pkgs.haskell-nix.tool compiler-nix-name "cabal" {
+    index-state = pkgs.haskell-nix.internalHackageIndexState;
+    version = "3.2.0.0";
+    # Cabal 3.2.1.0 no longer supports he mix of `cabal-version`,
+    # lack of `custom-setup` and `v1-install` used by ghcjs boot.
+    cabalProjectLocal = ''
+      constraints: Cabal <3.2.1.0
+    '';
+    materialized = ../materialized/ghcjs/cabal + "/${compiler-nix-name}";
+  }
 , ...
 }@args:
 let