Hi Sam, I dug around in the source and found this function: (delete-environment-variable! "FOOBAR").
It was located in os-primitives.scm: https://git.savannah.gnu.org/cgit/mit-scheme.git/tree/src/runtime/os-primitives.scm?h=release-11.2 I couldn't find docs for it, but there is a comment in the implementation that might be worth reading. Hope that helps! On Sun, May 1, 2022 at 4:52 AM Sam Lee <samlee...@yahoo.com> wrote: > I found that it is possible to unset an environment variable by setting > it to #f. For example, (set-environment-variable! "FOOBAR" #f) unsets > the environment variable named "FOOBAR". However, this doesn't seem to > be documented anywhere in the user manual or reference. Is this the way > to unset an environment variable in MIT Scheme? > > I am running MIT Scheme 11.2. > >
