diff --git a/bootstrap.sh b/bootstrap.sh
index cdbbd6d..b92a0d8 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -81,7 +81,8 @@ function main() {
   print 'Will now run the installer.'
   local -A colors=() errColors=()
   [ -t 1 ] && tput cnorm
-  sudo --preserve-env=HOMEBREW_BREW_GIT_REMOTE,HOMEBREW_BREW_CORE_GIT_REMOTE "${tmpdir}/install.sh" "$@"
+  isDebug && export MACOS_SYSTEM_DEBUG=true
+  sudo --preserve-env=HOMEBREW_BREW_GIT_REMOTE,HOMEBREW_BREW_CORE_GIT_REMOTE,MACOS_SYSTEM_DEBUG "${tmpdir}/install.sh" "$@"
   [ -t 1 ] && tput civis
   popd -q
 }
diff --git a/modules/lib.sh b/modules/lib.sh
index fe035cd..3c95ac5 100644
--- a/modules/lib.sh
+++ b/modules/lib.sh
@@ -7,6 +7,10 @@ function autoloadZShLib() {
   autoload -Uz "${funcNames[@]}"
 }
 
+function isDebug() {
+  test "${MACOS_SYSTEM_DEBUG}" = true -o "${MACOS_SYSTEM_DEBUG}" = 1
+}
+
 function configureLogging() {
   local output=tostdout level=info
   [ -n "${logfile}" ] && output=${logfile}