Distribution file not specified. 'ant crashlytics-upload-distribution' requires the build target to be specified as well. ant debug crashlytics-upload-distribution ant release crashlytics-upload-distribution This will build the given package and upload it. Uploading ${out.final.file} to Crashlytics... Looks like you're using an older version of Ant than we support. Please upgrade to at least 1.8.4 and try again! Please enter your Fabric Credentials: