Shorten nix-tools attribute path

Author: hamishmack

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

@@ -455,9 +455,9 @@ let
     inherit checkMaterialization;
   }) (evalPackages.runCommand (nameAndSuffix "plan-to-nix-pkgs") {
     nativeBuildInputs = [
-      nix-tools.project.hsPkgs.nix-tools.components.exes.plan-to-nix
+      nix-tools.exes.plan-to-nix
       dummy-ghc dummy-ghc-pkg cabal-install evalPackages.rsync evalPackages.gitMinimal ]
-      ++ pkgs.lib.optional supportHpack nix-tools.project.hsPkgs.hpack.components.exes.hpack;
+      ++ pkgs.lib.optional supportHpack nix-tools.exes.hpack;
     # Needed or stack-to-nix will die on unicode inputs
     LOCALE_ARCHIVE = pkgs.lib.optionalString (evalPackages.stdenv.buildPlatform.libc == "glibc") "${evalPackages.glibcLocales}/lib/locale/locale-archive";
     LANG = "en_US.UTF-8";

overlays/bootstrap.nix

@@ -992,7 +992,12 @@ in {
             wrapProgram "$out/bin/$prog" --prefix PATH : "${final.lib.makeBinPath tools}"
           done
         '';
-      }) // { inherit project; };
+      }) // {
+        inherit project;
+        exes = project.hsPkgs.nix-tools.components.exes // {
+          hpack = project.hsPkgs.hpack.component.exes.hpack;
+        };
+      };
 
     # Memoize the cabal-install and nix-tools derivations by adding:
     #   haskell-nix.cabal-install.ghcXXX

overlays/haskell.nix

@@ -193,7 +193,7 @@ final: prev: {
                 name = "01-index.tar.gz-at-${at}";
                 url = "https://hackage.haskell.org/01-index.tar.gz";
                 downloadToTemp = true;
-                postFetch = "${nix-tools.project.hsPkgs.nix-tools.components.exes.truncate-index}/bin/truncate-index -o $out -i $downloadedFile -s ${index-state}";
+                postFetch = "${nix-tools.exes.truncate-index}/bin/truncate-index -o $out -i $downloadedFile -s ${index-state}";
 
                 outputHashAlgo = "sha256";
                 outputHash = sha256;