diff --git a/ci/install-dependencies.sh b/ci/install-dependencies.sh
index 7f546c8552..8cc72503cb 100755
--- a/ci/install-dependencies.sh
+++ b/ci/install-dependencies.sh
@@ -34,7 +34,7 @@ linux-clang|linux-gcc)
 	popd
 	;;
 osx-clang|osx-gcc)
-	export HOMEBREW_NO_AUTO_UPDATE=1
+	export HOMEBREW_NO_AUTO_UPDATE=1 HOMEBREW_NO_INSTALL_CLEANUP=1
 	# Uncomment this if you want to run perf tests:
 	# brew install gnu-time
 	test -z "$BREW_INSTALL_PACKAGES" ||