oxipng: fix build on aarch64-linux

build fails with error: linker `aarch64-linux-gnu-gcc` not found
In my testing, it doesn't seem to be necessary to run aarch64 inside a
qemu vm.

pkgs/by-name/ox/oxipng/package.nix

@@ -1,9 +1,7 @@
 {
   lib,
-  stdenv,
   fetchFromGitHub,
   rustPlatform,
-  qemu,
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -21,8 +19,11 @@ rustPlatform.buildRustPackage rec {
   useFetchCargoVendor = true;
   cargoHash = "sha256-Z0otTCFwtGuSC1XBM3jcgGDFPZuMzQikZaYCnR+S6Us=";
 
-  # See https://github.com/shssoichiro/oxipng/blob/14b8b0e93a/.cargo/config.toml#L5
-  nativeCheckInputs = [ qemu ];
+  # don't require qemu for aarch64-linux tests
+  # error: linker `aarch64-linux-gnu-gcc` not found
+  postPatch = ''
+    rm .cargo/config.toml
+  '';
 
   meta = {
     homepage = "https://github.com/shssoichiro/oxipng";