diff --git a/README.md b/README.md
index ad35157..a78e8ff 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,7 @@ $ make
 
 - ~~[deepl](https://www.deepl.com/) - DeepL translator.~~
 - ~~[gimp](https://www.gimp.org/) - GNU Image Manipulation Program.~~
+- ~~[guile](https://www.gnu.org/software/guile/) - GNU Ubiquitous Intelligent Language for Extensions.~~
 - ~~[mdcat](https://github.com/lunaryorn/mdcat) - Show markdown documents on text terminals.~~
 - ~~[osquery](https://osquery.io) - SQL powered operating system instrumentation and analytics.~~
 - ~~[timing](https://timingapp.com/) - 💰 Time tracker for MacOS.~~
diff --git a/roles/macos/vars/main.yml b/roles/macos/vars/main.yml
index 5182151..94520fd 100644
--- a/roles/macos/vars/main.yml
+++ b/roles/macos/vars/main.yml
@@ -23,6 +23,7 @@ apps_brew:
   - git           # https://git-scm.com Distributed revision control system.
   - git-cal       # https://github.com/k4rthik/git-cal GitHub-like contributions calendar but on the command-line.
   - go            # https://golang.org Programming language to build simple/reliable/efficient software.
+  # - guile         # https://www.gnu.org/software/guile/ GNU Ubiquitous Intelligent Language for Extensions.
   - hadolint      # https://github.com/hadolint/hadolint Smarter Dockerfile linter to validate best practices.
   - haskell-stack # https://haskellstack.org/ The Haskell Tool Stack.
   - hlint         # https://github.com/ndmitchell/hlint Haskell source code suggestions.