svn in requirements-> build leads to errors: svn does not exist

[PatschD]

including "svn" in the meta.yaml as such:

requirements:
  build:
    - svn

gives an error:

└─ svn does not exist (perhaps a typo or a missing channel)

the specific PR: https://github.com/bioconda/bioconda-recipes/pull/48343

somebody recommended to replace svn with subversion which made the build tests for linux pass but crash on macos.

the reason i raise an issue here is because this exact example is on your help page:

https://docs.conda.io/projects/conda-build/en/latest/resources/define-metadata.html#requirements-section

I assume this to be a bug?