diff --git a/lib/setup-chromedriver.sh b/lib/setup-chromedriver.sh
index 91f756ba..3acacd72 100755
--- a/lib/setup-chromedriver.sh
+++ b/lib/setup-chromedriver.sh
@@ -1,33 +1,36 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -eo pipefail
 
 CURL="curl --silent --location --fail --retry 10"
 JSON_URL=https://googlechromelabs.github.io/chrome-for-testing/known-good-versions-with-downloads.json
 
-VERSION=$1
-ARCH=$2
+VERSION="${1:-}"
+ARCH="${2:-linux64}"
+
+sudo=$(command -v sudo)
 
 if [[ "${ARCH}" =~ ^linux64 ]]; then
     CHROMEAPP=google-chrome
-    sudo=$(command -v sudo)
     APP="${CHROMEAPP}"
-    if ! dpkg -s "${APP}" >/dev/null; then
-        ${sudo} apt-key adv --keyserver keyserver.ubuntu.com --recv-keys A040830F7FAC5991
-        echo "deb [arch=amd64] https://dl.google.com/linux/chrome/deb/ stable main" | ${sudo} tee /etc/apt/sources.list.d/google.list
-        APP=google-chrome-stable
-    fi
-    apps=()
-    test -z "${sudo}" && apps+=(sudo)
-    type -a curl > /dev/null 2>&1 || apps+=(curl)
-    type -a "${CHROMEAPP}" > /dev/null 2>&1 || apps+=("${APP}")
-    type -a jq > /dev/null 2>&1 || apps+=(jq)
-    type -a unzip > /dev/null 2>&1 || apps+=(unzip)
-    if (("${#apps[@]}")); then
-        echo "Installing ${apps[*]}..."
-        export DEBIAN_FRONTEND=noninteractive
-        ${sudo} apt-get update
-        ${sudo} apt-get install -y "${apps[@]}"
+    if command -v dpkg &>/dev/null; then
+        if ! dpkg -s "${APP}" >/dev/null; then
+            ${sudo} apt-key adv --keyserver keyserver.ubuntu.com --recv-keys A040830F7FAC5991
+            echo "deb [arch=amd64] https://dl.google.com/linux/chrome/deb/ stable main" | ${sudo} tee /etc/apt/sources.list.d/google.list >/dev/null
+            APP=google-chrome-stable
+        fi
+        apps=()
+        test -z "${sudo}" && apps+=(sudo)
+        type -a curl > /dev/null 2>&1 || apps+=(curl)
+        type -a "${CHROMEAPP}" > /dev/null 2>&1 || apps+=("${APP}")
+        type -a jq > /dev/null 2>&1 || apps+=(jq)
+        type -a unzip > /dev/null 2>&1 || apps+=(unzip)
+        if (("${#apps[@]}")); then
+            echo "Installing ${apps[*]}..."
+            export DEBIAN_FRONTEND=noninteractive
+            ${sudo} apt-get update
+            ${sudo} apt-get install -y --no-install-recommends "${apps[@]}"
+        fi
     fi
 fi
 
@@ -35,10 +38,10 @@ if [[ "${ARCH}" =~ ^mac64 ]]; then
     CHROMEAPP="/Applications/Google Chrome.app/Contents/MacOS/Google Chrome"
 fi
 
-if [[ "${VERSION}" ]]; then
+if [[ -n "${VERSION}" ]]; then
     CHROME_VERSION=$(cut -d '.' -f 1 <<<"${VERSION}")
 else
-    CHROME_VERSION=$("${CHROMEAPP}" --version | cut -f 3 -d ' ' | cut -d '.' -f 1)
+    CHROME_VERSION=$("${CHROMEAPP}" --version | cut -d ' ' -f 3 | cut -d '.' -f 1)
 fi
 echo "CHROME_VERSION=${CHROME_VERSION}"
 
@@ -54,13 +57,13 @@ if ((CHROME_VERSION < 115)); then
     echo "Downloading ${URL}..."
     ${CURL} -o chromedriver.zip "${URL}"
     unzip -o -q chromedriver.zip
-    sudo mv chromedriver /usr/local/bin/chromedriver
+    ${sudo} mv chromedriver /usr/local/bin/chromedriver
     rm -f chromedriver.zip
     exit
 fi
 
 if [[ -z "${VERSION}" ]]; then
-    VERSION=$("${CHROMEAPP}" --version | cut -f 3 -d ' ')
+    VERSION=$("${CHROMEAPP}" --version | cut -d ' ' -f 3)
     echo "VERSION=${VERSION}"
 fi
 if [[ "${ARCH}" =~ ^mac64 ]]; then
@@ -73,7 +76,7 @@ JQ=".versions[] | select(.version == \"${VERSION}\") | .downloads.chromedriver[]
 URL=$(jq -r "${JQ}" <<<"${JSON}")
 if [[ -z "${URL}" ]]; then
     echo "Falling back to latest version of ChromeDriver for ${ARCH}"
-    VERSION3=$(cut -d '.' -f1-3 <<<"${VERSION}")
+    VERSION3=$(cut -d '.' -f 1-3 <<<"${VERSION}")
     echo "VERSION3=${VERSION3}"
     JQ2="[ .versions[] | select(.version | startswith(\"${VERSION3}.\")) ] | last | .version"
     VERSION=$(jq -r "${JQ2}" <<<"${JSON}")
@@ -85,5 +88,5 @@ echo "Installing ChromeDriver ${VERSION} for ${ARCH}"
 echo "Downloading ${URL}..."
 ${CURL} -o chromedriver.zip "${URL}"
 unzip -o -q chromedriver.zip
-sudo mv "chromedriver-${ARCH}/chromedriver" /usr/local/bin/chromedriver
+${sudo} mv "chromedriver-${ARCH}/chromedriver" /usr/local/bin/chromedriver
 rm -fr chromedriver.zip chromedriver-*