Temporarily disable JS backend builds in CI

The JS backend builds fail due to a hash mismatch in the
head.hackage.ghc.haskell.org fixed-output derivation in haskell.nix:
  specified: sha256-5gKLigkUTkkABGG8B9zNq8NKRIHv97K9No4kTLK/GyQ=
  got:       sha256-AO/vHIMSIBwjbp5GY561SmnPr5qTTyBt9ruy8D3lKZI=

This filters out all *-js-* shells from hydraJobs while keeping them
available in devShells for local development.

TODO: Remove this filter once upstream haskell.nix fixes the hash.

Author: angerman

flake.nix

@@ -198,13 +198,18 @@
         # scripts for other platforms.  That way a linux GHA can download the
         # cached files without needing access to the actual build platform.
         devShellsWithEvalOnLinux = devShellsWithToolsModule { evalSystem = "x86_64-linux"; };
+        # Filter out JS shells from hydraJobs due to head.hackage hash mismatch in haskell.nix
+        # TODO: Remove this filter once upstream haskell.nix fixes the head.hackage hash
+        filterNonJS = pkgs.lib.filterAttrs (name: _: !(pkgs.lib.hasInfix "-js" name));
+        devShellsForCI = filterNonJS devShells;
+        devShellsWithEvalOnLinuxForCI = filterNonJS devShellsWithEvalOnLinux;
       in {
         inherit devShells;
-        hydraJobs = devShells // {
+        hydraJobs = devShellsForCI // {
           # *-dev sentinel job. Singals all -env have been built.
           required = pkgs.runCommand "required dependencies (${system})" {
               _hydraAggregate = true;
-              constituents = map (name: "${system}.${name}-env") (builtins.attrNames devShellsWithEvalOnLinux);
+              constituents = map (name: "${system}.${name}-env") (builtins.attrNames devShellsWithEvalOnLinuxForCI);
             } "touch  $out";
           } // (pkgs.lib.mapAttrs' (name: drv:
             pkgs.lib.nameValuePair "${name}-env" (
@@ -251,9 +256,9 @@
                 license = pkgs.lib.licenses.asl20;
                 platforms = pkgs.lib.platforms.unix;
               };
-            })) devShells)
+            })) devShellsForCI)
           // (pkgs.lib.mapAttrs' (name: drv:
-            pkgs.lib.nameValuePair "${name}-plans" drv.plans) devShells);
+            pkgs.lib.nameValuePair "${name}-plans" drv.plans) devShellsForCI);
         packages.cabalProjectLocal-static        = (import ./quirks.nix { pkgs = static-pkgs; static = true; }).template;
         packages.cabalProjectLocal-cross-js      = (import ./quirks.nix { pkgs = js-pkgs;                    }).template;
         packages.cabalProjectLocal-cross-windows = (import ./quirks.nix { pkgs = windows-pkgs;               }).template;