The correct flag to disable the cache numbers is:

lime_disable_assets_version

You can add this in your Project.xml:

<haxedef name="lime_disable_assets_version" />

or add -D lime_disable_assets_version to your lime build:

lime build html5 -D lime_disable_assets_version

If you want to use a known number (instead of disabling them completely), there is the lime-assets-version flag:

<haxedef name="lime-assets-version" value="123" />

-Dlime-assets-version=123

Sources:

• https://community.openfl.org/t/html5-get-that-random-query-string/11992/4
• https://github.com/openfl/lime/blob/68107eeaa8c9a819f90a5f74d4111ff6f3676277/src/lime/utils/AssetCache.hx#L28