let
  unstable = nixpkgs-unstable.legacyPackages.<ARCH>;
  buildGo124Module = unstable.buildGoModule.override { go = unstable.go_1_24; };
in
...

is there a way to make a non-fixed-output derivation with buildGoModule?
I have a package with dependencies that need to be patched to point to nix store
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
packages = rec {
env86 = pkgs.buildGoModule {
name = "env86";
# TODO: Real version
version = "1";
src = ./.;
buildInputs = with pkgs; [
gtk3
];

  # HACK: this package uses purego to link libraries at runtime,
  # which will fail since we have no global libs, patch the library
  # paths to point to nix store
  modPostBuild = ''
    sed -i 's|"libgtk-3.so"|"${pkgs.gtk3}/lib/libgtk-3.so"|' vendor/tractor.dev/toolkit-go/desktop/linux/linux.go
  '';
  vendorHash = pkgs.lib.fakeHash;
  outputHashMode = null;
  outputHashAlgo = null;
  outputHash = null;

  # HACK: guest86 needs to be built externally
  preBuild = ''
    rm -r cmd/guest86
  '';
};
default = env86;

};
but this still results in illegal path references in fixed-output derivation

is there a way to make a non-fixed-output derivation with buildGoModule?
I have a package with dependencies that need to be patched to point to nix store

  packages = rec {
    env86 = pkgs.buildGoModule {
      name = "env86";
      # TODO: Real version
      version = "1";
      src = ./.;
      buildInputs = with pkgs; [
        gtk3
      ];


      # HACK: this package uses purego to link libraries at runtime,
      # which will fail since we have no global libs, patch the library
      # paths to point to nix store
      modPostBuild = ''
        sed -i 's|"libgtk-3.so"|"${pkgs.gtk3}/lib/libgtk-3.so"|' vendor/tractor.dev/toolkit-go/desktop/linux/linux.go
      '';
      vendorHash = pkgs.lib.fakeHash;
      outputHashMode = null;
      outputHashAlgo = null;
      outputHash = null;

      # HACK: guest86 needs to be built externally
      preBuild = ''
        rm -r cmd/guest86
      '';
    };
    default = env86;

  };

but this still results in illegal path references in fixed-output derivation