Add ghc 8.10.1

ci.nix

@@ -12,21 +12,23 @@
     "R1909" = "nixpkgs-1909";
     "R2003" = "nixpkgs-2003";
   };
-  compilerNixNames = builtins.mapAttrs (defaultCompilerNixName: _:
-    (import ./default.nix { inherit checkMaterialization defaultCompilerNixName; }).nixpkgsArgs) {
+  compilerNixNames = nixpkgsName: nixpkgs: builtins.mapAttrs (defaultCompilerNixName: _:
+    (import ./default.nix { inherit checkMaterialization defaultCompilerNixName; }).nixpkgsArgs) ({
     ghc865 = {};
+  } // nixpkgs.lib.optionalAttrs (nixpkgsName == "R2003") {
     ghc883 = {};
-  };
+    ghc8101 = {};
+  });
   systems = nixpkgs: nixpkgs.lib.filterAttrs (_: v: builtins.elem v supportedSystems) {
     # I wanted to take these from 'lib.systems.examples', but apparently there isn't one for linux!
     linux = "x86_64-linux";
     darwin = "x86_64-darwin";
   };
-  crossSystems = nixpkgsName: nixpkgs: system:
+  crossSystems = nixpkgsName: nixpkgs: compilerNixName: system:
     # We need to use the actual nixpkgs version we're working with here, since the values
     # of 'lib.systems.examples' are not understood between all versions
     let lib = nixpkgs.lib;
-    in lib.optionalAttrs (system == "x86_64-linux") {
+    in lib.optionalAttrs (system == "x86_64-linux" && compilerNixName != "ghc8101") {
     # Windows cross compilation is currently broken on macOS
     inherit (lib.systems.examples) mingwW64;
   } // lib.optionalAttrs (system == "x86_64-linux") {
@@ -39,7 +41,7 @@ dimension "Nixpkgs version" nixpkgsVersions (nixpkgsName: nixpkgs-pin:
   let pinnedNixpkgsSrc = sources.${nixpkgs-pin};
       # We need this for generic nixpkgs stuff at the right version
       genericPkgs = import pinnedNixpkgsSrc {};
-  in dimension "GHC version" compilerNixNames (compilerNixName: nixpkgsArgs:
+  in dimension "GHC version" (compilerNixNames nixpkgsName genericPkgs) (compilerNixName: nixpkgsArgs:
     dimension "System" (systems genericPkgs) (systemName: system:
       let pkgs = import pinnedNixpkgsSrc (nixpkgsArgs // { inherit system; });
           build = import ./build.nix { inherit pkgs ifdLevel; };
@@ -49,33 +51,37 @@ dimension "Nixpkgs version" nixpkgsVersions (nixpkgsName: nixpkgs-pin:
         # TODO: can we merge this into the general case by picking an appropriate "cross system" to mean native?
         native = pkgs.recurseIntoAttrs ({
           inherit (build) tests tools maintainer-scripts maintainer-script-cache;
-          ghc = pkgs.haskell-nix.compiler."${compilerNixName}";
+          ghc = pkgs.buildPackages.haskell-nix.compiler."${compilerNixName}";
         } // pkgs.lib.optionalAttrs (ifdLevel >= 1) {
           iserv-proxy = pkgs.ghc-extra-packages."${compilerNixName}".iserv-proxy.components.exes.iserv-proxy;
-        } // pkgs.lib.optionalAttrs (ifdLevel >= 2) {
+        } // pkgs.lib.optionalAttrs (ifdLevel >= 3) {
           hello = (pkgs.haskell-nix.hackage-package { name = "hello"; version = "1.0.0.2"; }).components.exes.hello;
         });
       }
       //
-      dimension "Cross system" (crossSystems nixpkgsName genericPkgs system) (crossSystemName: crossSystem:
+      dimension "Cross system" (crossSystems nixpkgsName genericPkgs compilerNixName system) (crossSystemName: crossSystem:
         # Cross builds
         let pkgs = import pinnedNixpkgsSrc (nixpkgsArgs // { inherit system crossSystem; });
             build = import ./build.nix { inherit pkgs ifdLevel; };
         in pkgs.recurseIntoAttrs (pkgs.lib.optionalAttrs (ifdLevel >= 1) {
+          ghc = pkgs.buildPackages.haskell-nix.compiler."${compilerNixName}";
           # TODO: look into cross compiling ghc itself
           # ghc = pkgs.haskell-nix.compiler."${compilerNixName}";
           # TODO: look into making tools work when cross compiling
           # inherit (build) tools;
+          # Tests are broken on aarch64 cross https://github.com/input-output-hk/haskell.nix/issues/513
+          tests =
+            if (crossSystemName != "aarch64-multiplatform")
+              then build.tests
+              else pkgs.recurseIntoAttrs {
+                # Even on aarch64 we still want to build the pinned files
+                inherit (build.tests) haskellNixRoots;
+              };
         } // pkgs.lib.optionalAttrs (ifdLevel >= 2) {
           remote-iserv = pkgs.ghc-extra-packages."${compilerNixName}".remote-iserv.components.exes.remote-iserv;
           iserv-proxy = pkgs.ghc-extra-packages."${compilerNixName}".iserv-proxy.components.exes.iserv-proxy;
         } // pkgs.lib.optionalAttrs (ifdLevel >= 3) {
           hello = (pkgs.haskell-nix.hackage-package { name = "hello"; version = "1.0.0.2"; }).components.exes.hello;
-        }
-        //
-        # Tests are broken on aarch64 cross https://github.com/input-output-hk/haskell.nix/issues/513
-        pkgs.lib.optionalAttrs (crossSystemName != "aarch64-multiplatform") {
-          inherit (build) tests;
         })
       )
     )

lib/call-cabal-project-to-nix.nix

@@ -147,7 +147,7 @@ let
   fetchRepo = repo:
     let sha256 = repo."--sha256" or (lookupSha256 repo);
     in (if sha256 != null
-      then pkgs.fetchgit {
+      then pkgs.evalPackages.fetchgit {
           url = repo.location;
           rev = repo.tag;
           inherit sha256;

lib/default.nix

@@ -4,8 +4,8 @@
 with haskellLib;
 
 let
-  # Why `final.evalPackages.buildPackages.git`?
-  # Why not just final.evalPackages.git?
+  # Why `final.evalPackages.buildPackages.gitMinimal`?
+  # Why not just final.evalPackages.gitMinimal?
   #
   # A problem arises when `evalPackages` is `buildPackages`.i
   # As may be the case in a flake.
@@ -24,7 +24,7 @@ let
   #   * When `gdb` does not exist for `js`, so when cross
   #     compiling with ghcjs `final.buildPackages.git` fails
   #     to build at all.
-  inherit (pkgs.evalPackages.buildPackages) git;
+  inherit (pkgs.evalPackages.buildPackages) gitMinimal;
 
 in {
   # Within the package components, these are the attribute names of
@@ -204,7 +204,8 @@ in {
 
   # Clean git directory based on `git ls-files --recurse-submodules`
   cleanGit = import ./clean-git.nix {
-    inherit lib git cleanSourceWith;
+    inherit lib cleanSourceWith;
+    git = gitMinimal;
     inherit (pkgs.evalPackages) runCommand;
   };