Eigen patch not found when cross compiling x86_64-linux on aarch64-darwin

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1

When I cross crompile a nixpkgs overlay on aarch64-darwin that depends on pkgs.eigen, I get the following logs:

  ⎿  Running phase: unpackPhase
     @nix { "action": "setPhase", "phase": "unpackPhase" }
     unpacking source archive /nix/store/80029qwc79d4wql72djrlndrrb7rhnpi-source
     source root is source
     Running phase: patchPhase
     @nix { "action": "setPhase", "phase": "patchPhase" }
     applying patch /nix/store/6yayhdb6xlj7ax9zrzb8ld7fvwwykd5f-include-dir.patch
     /nix/store/mrvg4qq09d51w5s95v15y4ym05q009fd-stdenv-darwin/setup: line 1421: /nix/store/6yayhdb6xlj7ax9zrzb8ld7fvwwykd5f-include-dir.patch: No such file or directory

Here’s the eigen src, nixpkgs/pkgs/development/libraries/eigen/default.nix at 1d3aeb5a193b9ff13f63f4d9cc169fb88129f860 · NixOS/nixpkgs · GitHub .

I can see that it includes a patch with a relative path, I’m confused why the patch isn’t found.

2

Odd. After you attempt the build, does the file actually exist if you
ls /nix/store/6yay... it? What happens if you manually add the file to
the store via CLI