yaml-merge: Fix running the cross-compiled script

This package is used in the adguardhome nixos module which is often
cross-compiled, therefore this workaround is justified.

pkgs/by-name/ya/yaml-merge/package.nix

@@ -3,6 +3,7 @@
   stdenv,
   fetchFromGitHub,
   python3Packages,
+  pkgsHostTarget,
 }:
 
 stdenv.mkDerivation {
@@ -17,7 +18,11 @@ stdenv.mkDerivation {
   };
 
   pythonPath = with python3Packages; [ pyyaml ];
-  nativeBuildInputs = with python3Packages; [ wrapPython ];
+  nativeBuildInputs = [
+    # Not `python3Packages.wrapPython` to workaround `python3Packages.wrapPython.__spliced.buildHost` having the wrong `pythonHost`
+    # See https://github.com/NixOS/nixpkgs/issues/434307
+    pkgsHostTarget.python3Packages.wrapPython
+  ];
 
   installPhase = ''
     install -Dm755 yaml-merge.py $out/bin/yaml-merge