diff --git a/package.json b/package.json
index 90764154..ab9f639d 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "resin-supervisor",
   "version": "1.11.0",
   "scripts": {
-    "postinstall": "bash postinstall.sh",
+    "postinstall": "sh postinstall.sh",
     "start": "./entry.sh"
   },
   "dependencies": {
diff --git a/postinstall.sh b/postinstall.sh
index 0ed001ba..799044c9 100755
--- a/postinstall.sh
+++ b/postinstall.sh
@@ -1,7 +1,6 @@
 set -o errexit
-set -o pipefail
 
-if [[ $NODE_ENV == 'production' ]]; then
+if [ "$NODE_ENV" = "production" ]; then
 	# Remove node-gyp cache
 	rm -rf ~/.node-gyp/
 	# Remove cached git deps