Disable CI cache for npm packages for now

Author: kateinoigakukun

rakelib/packaging.rake

@@ -25,6 +25,10 @@ def npm_pkg_build_command(pkg)
 end
 
 def npm_pkg_rubies_cache_key(pkg)
+  # FIXME: Now CrossRubyExtProduct depends on just built baseruby, and exts can be
+  # built after restoring the tarball cache. So it can fail to find baseruby when the
+  # cache hit. We need to orchestrate the build dependency graph properly.
+  return nil if pkg[:name] == "ruby-head-wasm-wasi"
   build_command = npm_pkg_build_command(pkg)
   return nil unless build_command
   require "open3"