The build command has a flag --enable_kyaml, e.g.
In this release branch of kustomize (branch v3.9.x), the default value of the flag is true.
This automatically uses the kyaml YAML manipulation libs instead of k/k apimachinery libs.
The new libs are the path forward, and allow use of kustomize libraries in kubectl.
If this causes new problems, please file an issue.
You can turn the flag off, e.g.
kustomize build --enable_kyaml=false $target
or download and use kustomize v3.8.8, which defaults the flag to false.
8c9da151 Auto update go.sum
f8a3c042 Pin kustomize to api/v0.7.0, enabling kyaml by default
81ca271e Flip default value of --enable_kyaml from false to true.