diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b2d14a4f..2687425f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -48,6 +48,8 @@ jobs:
       fail-fast: false
     env:
       BUNDLE_WITHOUT: development
+      # reduce MacOS CI time, don't need to clean a runtime that isn't saved
+      HOMEBREW_NO_INSTALL_CLEANUP: 1
     steps:
       - uses: actions/checkout@v3
       # https://github.com/ruby/setup-ruby