chore(deps): update nixsgx dependency

Get rid of the snowfall lib, because it makes life harder
for this very small project.

Signed-off-by: Harald Hoyer <harald@matterlabs.dev>

packages/vault-auth-tee.nix

@@ -0,0 +1,33 @@
+{ lib
+, pkgs
+, ...
+}:
+
+pkgs.buildGoModule {
+  buildInputs = with pkgs; [
+    nixsgx.sgx-sdk
+    nixsgx.sgx-dcap
+    nixsgx.sgx-dcap.quote_verify
+  ];
+
+  outputs = [ "out" "sha" ];
+
+  name = "vault-auth-tee";
+  src = with lib.fileset; toSource {
+    root = ./..;
+    fileset = unions [
+      ../go.mod
+      ../go.sum
+      ../cmd
+      ../test-fixtures
+      (fileFilter (file: file.hasExt "go") ./..)
+    ];
+  };
+
+  postFixup = ''
+    mkdir -p $sha/share
+    sha256sum $out/bin/vault-auth-tee | (read a _; echo $a) > $sha/share/vault-auth-tee.sha256
+  '';
+
+  vendorHash = "sha256-3jjtMSs1u4o+6hu+gk8zuzKNhqjHQtZ4DEfYlW3AJrA=";
+}