fastcluster/ols: fix cross compilation to moby

pkgs/additional/nixpkgs/list.nix

@@ -30,6 +30,13 @@ in
   #   hash = "sha256-fGuS46f9qSMRHvWZvTmcirKufIqlXHwwhckeK1RNejE=";
   # })
 
+  (fetchpatch' {
+    # xsimd is required by scipy, which is required by ols
+    title = "xsimd: fix cross compilation";
+    prUrl = "https://github.com/NixOS/nixpkgs/pull/321253";
+    hash = "sha256-0gC86tyoSEtpGBdz9ISc1WyCQm+ZM3epGzpK1PUNzCk=";
+  })
+
   (fetchpatch' {
     title = "unl0kr: 2.0.0 -> 3.2.0";
     prUrl = "https://github.com/NixOS/nixpkgs/pull/319126";

pkgs/python-packages/fastcluster/default.nix

@@ -1,13 +1,14 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
+, oldest-supported-numpy
 , numpy
-, scipy
+, setuptools
 }: buildPythonPackage rec {
-  pname = "mypackage";
+  pname = "fastcluster";
   version = "1.2.6";
-  # format = "pyproject";  # but i'd have to substitute "oldest_supported_numpy" -> "numpy"
+  format = "pyproject";
-  format = "setuptools";
+  # format = "setuptools";
 
   src = fetchFromGitHub {
     owner = "fastcluster";
@@ -16,13 +17,14 @@
     hash = "sha256-8FDipkAcOAI5zAC7JaJExe6HO1xHg+eXAL7IUIVrA3k=";
   };
 
-  propagatedBuildInputs = [
+  nativeBuildInputs = [
-    numpy
+    oldest-supported-numpy
+    setuptools
   ];
 
-  checkInputs = [
+  # propagatedBuildInputs = [
-    scipy
+  #   numpy
-  ];
+  # ];
 
   pythonImportsCheck = [
     "fastcluster"