> for example allowing to specify environment variables in manifest.scm files. Just use setenv in the manifest: (setenv "MAMA" "MIA") (specifications->manifes

> for example allowing to specify environment variables in manifest.scm files. Just use setenv in the manifest: (setenv "MAMA" "MIA") (specifications->manifest (list "hello")) Then `guix shell -m this-file.scm` enters a shell session where "hello" exists and the env var MAMA is set to "MIA".