I've just published draft #2 of SRFI 179.  It was submitted by Bradley J. Lucier, author of the SRFI.

  https://srfi.schemers.org/srfi-179/

Here is the commit summary:

  - Apply changes from Bradley J. Lucier.
  - Move Github link to Implementation section.
  - Publish second draft.

Here's the diff:

  https://github.com/scheme-requests-for-implementation/srfi-179/compare/9174e46..57ef276