Fix error when checking for dry run flag

Change-Id: Ic8367197da753ff2316204ec76423481d447ec82
diff --git a/tools/build/buck-publish-package b/tools/build/buck-publish-package
index fe32d8f..cc837bc 100755
--- a/tools/build/buck-publish-package
+++ b/tools/build/buck-publish-package
@@ -44,7 +44,7 @@
 zip -r ../$BUCK_ZIP buck .buck_version plugins
 popd #$ZIP_STAGE
 
-if [ "$1" -ne "--dry-run" ]; then
+if [ "$1" != "--dry-run" ]; then
     # publish zip
     #FIXME check for s3 credentials
     uploadToS3.py --dest third-party/ $BUCK_ZIP