Use latest Haskell.nix

cabal.project

@@ -32,8 +32,6 @@ packages:
   trace-resources
   trace-forward
 
-extra-packages: Cabal
-
 program-options
   ghc-options: -Werror
 
@@ -59,8 +57,7 @@ package plutus-scripts-bench
 
 constraints:
   , wai-extra < 3.1.15
-  , Cabal < 3.14
-
+
 allow-newer:
   , katip:Win32
   , ekg-wai:time

flake.nix

@@ -15,9 +15,7 @@
       flake = false;
     };
     haskellNix = {
-      # GHC 8.10.7 cross compilation for windows is broken in newer versions of haskell.nix.
-      # Unpin this once we no longer need GHC 8.10.7.
-      url = "github:input-output-hk/haskell.nix/cb139fa956158397aa398186bb32dd26f7318784";
+      url = "github:input-output-hk/haskell.nix";
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.hackage.follows = "hackageNix";
     };

nix/haskell.nix

@@ -113,6 +113,7 @@ let
           ({ lib, pkgs, ... }: {
             packages.cardano-tracer.package.buildable = with pkgs.stdenv.hostPlatform; lib.mkForce (!isMusl);
             packages.cardano-node-chairman.components.tests.chairman-tests.buildable = lib.mkForce pkgs.stdenv.hostPlatform.isUnix;
+            package-keys = ["plutus-tx-plugin"];
             packages.plutus-tx-plugin.components.library.platforms = with lib.platforms; [ linux darwin ];
             packages.tx-generator.package.buildable = with pkgs.stdenv.hostPlatform; !isMusl;
 
@@ -141,10 +142,6 @@ let
             packages.unix-time.postPatch = ''
               sed -i 's/mingwex//g' unix-time.cabal
             '';
-            # For these two packages the custom setups fail, as we end up with multiple instances of
-            # lib:Cabal. Likely a haskell.nix bug.
-            packages.entropy.package.buildType = lib.mkForce "Simple";
-            packages.HsOpenSSL.package.buildType = lib.mkForce "Simple";
             #packages.plutus-core.components.library.preBuild = ''
             #  export ISERV_ARGS="-v +RTS -Dl"
             #  export PROXY_ARGS=-v
@@ -218,6 +215,7 @@ let
             in
             {
               # split data output for ekg to reduce closure size
+              package-keys = ["ekg"];
               packages.ekg.components.library.enableSeparateDataOutput = true;
               packages.cardano-node-chairman.components.tests.chairman-tests.build-tools =
                 lib.mkForce [
@@ -321,17 +319,18 @@ let
             # <no location info>: error: ghc: ghc-iserv terminated (-11)
             packages.plutus-core.components.library.ghcOptions = [ "-fexternal-interpreter" ];
           })
-          ({ lib, ... }@args: {
-            options.packages = lib.mkOption {
-              type = lib.types.attrsOf (lib.types.submodule (
-                { config, lib, ... }:
-                lib.mkIf config.package.isLocal
-                {
-                  configureFlags = [ "--ghc-option=-Werror"]
-                    ++ lib.optional (args.config.compiler.version == "8.10.7") "--ghc-option=-Wwarn=unused-packages";
-                }
-              ));
-            };
+          ({ config, lib, ... }@args: {
+            options.packages = lib.genAttrs config.package-keys (_:
+              lib.mkOption {
+                type = lib.types.submodule (
+                  { config, lib, ... }:
+                  lib.mkIf config.package.isLocal
+                  {
+                    configureFlags = [ "--ghc-option=-Werror"]
+                      ++ lib.optional (args.config.compiler.version == "8.10.7") "--ghc-option=-Wwarn=unused-packages";
+                  }
+                );
+              });
           })
           ({ lib, pkgs, ... }: lib.mkIf pkgs.stdenv.hostPlatform.isLinux {
             # systemd can't be statically linked
@@ -341,18 +340,19 @@ let
           })
           # disable haddock
           # Musl libc fully static build
-          ({ lib, ... }: {
-            options.packages = lib.mkOption {
-              type = lib.types.attrsOf (lib.types.submodule (
-                { config, lib, pkgs, ...}:
-                lib.mkIf (pkgs.stdenv.hostPlatform.isMusl && config.package.isLocal)
-                {
-                  # Module options which adds GHC flags and libraries for a fully static build
-                  enableShared = true; # TH code breaks if this is false.
-                  enableStatic = true;
-                }
-              ));
-            };
+          ({ config, lib, ... }: {
+            options.packages = lib.genAttrs config.package-keys (_:
+              lib.mkOption {
+                type = lib.types.submodule (
+                  { config, lib, pkgs, ...}:
+                  lib.mkIf (pkgs.stdenv.hostPlatform.isMusl && config.package.isLocal)
+                  {
+                    # Module options which adds GHC flags and libraries for a fully static build
+                    enableShared = true; # TH code breaks if this is false.
+                    enableStatic = true;
+                  }
+                );
+              });
             config =
               lib.mkIf pkgs.stdenv.hostPlatform.isMusl
               {

nix/workbench/default.nix

@@ -10,7 +10,7 @@ let
   # recover CHaP location from cardano's project
   chap = cardanoNodeProject.args.inputMap."https://chap.intersectmbo.org/";
   # build plan as computed by nix
-  nixPlanJson = cardanoNodeProject.plan-nix.json;
+  nixPlanJson = cardanoNodeProject.plan-nix + "/plan.json";
 
   # Workbench derivation and functions to create derivations from `wb` commands.
   ##############################################################################

nix/workbench/shell.nix

@@ -21,7 +21,7 @@ let
     chap = project.args.inputMap."https://chap.intersectmbo.org/";
 
     # build plan as computed by nix
-    nixPlanJson = project.plan-nix.json;
+    nixPlanJson = project.plan-nix + "/plan.json";
 
 in project.shellFor {
   name = "workbench-shell";