Build failure: yacreader on aarch64-darwin

pipewire is not available on darwin, and I believe this change caused yacreader to become unavailable. I believe the fix would probably be similar to #407759.

Here is the full evaluation error I got trying to build my home-manager config:

error:
       … while calling the 'derivationStrict' builtin
         at «nix-internal»/derivation-internal.nix:38:12:
           37|
           38|   strict = drvFunc drvAttrs;
             |            ^
           39|

       … while evaluating derivation 'home-manager-generation'
         whose name attribute is located at «github:nixos/nixpkgs/567a49d»/pkgs/stdenv/generic/make-derivation.nix:651:11

       … while evaluating attribute 'buildCommand' of derivation 'home-manager-generation'
         at «github:nixos/nixpkgs/567a49d»/pkgs/build-support/trivial-builders/default.nix:81:17:
           80|         enableParallelBuilding = true;
           81|         inherit buildCommand name;
             |                 ^
           82|         passAsFile = [ "buildCommand" ] ++ (derivationArgs.passAsFile or [ ]);

<snip>

       … while calling the 'throw' builtin
         at «github:nixos/nixpkgs/567a49d»/pkgs/stdenv/generic/check-meta.nix:701:13:
          700|           else
          701|             throw msg;
             |             ^
          702|

       error: Refusing to evaluate package 'pipewire-1.6.5' in /nix/store/lbi962pdq1l03sb813j3dq4af06zwk36-source/pkgs/by-name/pi/pipewire/package.nix:293 because it is not available on the requested hostPlatform:
         hostPlatform.system = "aarch64-darwin"
         package.meta.platforms = [
           "aarch64-linux"
           "arc-linux"
           "armv5tel-linux"
           "armv6l-linux"
           "armv7a-linux"
           "armv7l-linux"
           "i686-linux"
           "loongarch64-linux"
           "m68k-linux"
           "sh4-linux"
           "microblaze-linux"
           "microblazeel-linux"
           "mips-linux"
           "mips64-linux"
           "mips64el-linux"
           "mipsel-linux"
           "powerpc-linux"
           "powerpc64-linux"
           "powerpc64le-linux"
           "riscv32-linux"
           "riscv64-linux"
           "s390-linux"
           "s390x-linux"
           "x86_64-linux"
           "i686-freebsd"
           "x86_64-freebsd"
           "aarch64-freebsd"
         ]
         package.meta.badPlatforms = [ ]

       a) To temporarily allow packages that are unsupported for this system, you can use an environment variable
          for a single invocation of the nix tools.

            $ export NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1

          Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake,
                then pass `--impure` in order to allow use of environment variables.

       b) For `nixos-rebuild` you can set
         { nixpkgs.config.allowUnsupportedSystem = true; }
       in configuration.nix to override this.

       c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
         { allowUnsupportedSystem = true; }
       to ~/.config/nixpkgs/config.nix.

Originally posted by @bcc32 in https://github.com/NixOS/nixpkgs/issues/527314#issuecomment-4724878472

Start with pkgs/by-name/pi/pipewire/package.nix at line 293 and compare the platform-handling change in issue #407759. Trace how yacreader depends on pipewire, then verify that evaluating yacreader for aarch64-darwin no longer rejects the unavailable dependency.