diff --git a/build/ci.go b/build/ci.go
index 5968e37024..cb89e914bb 100644
--- a/build/ci.go
+++ b/build/ci.go
@@ -430,6 +430,10 @@ func maybeSkipArchive(env build.Environment) {
 		log.Printf("skipping because this is a PR build")
 		os.Exit(0)
 	}
+	if env.IsCronJob {
+		log.Printf("skipping because this is a cron job")
+		os.Exit(0)
+	}
 	if env.Branch != "master" && !strings.HasPrefix(env.Tag, "v1.") {
 		log.Printf("skipping because branch %q, tag %q is not on the whitelist", env.Branch, env.Tag)
 		os.Exit(0)
@@ -965,9 +969,10 @@ func doPurge(cmdline []string) {
 	)
 	flag.CommandLine.Parse(cmdline)
 
-	env := build.Env()
-	maybeSkipArchive(env)
-
+	if env := build.Env(); !env.IsCronJob {
+		log.Printf("skipping because not a cron job")
+		os.Exit(0)
+	}
 	// Create the azure authentication and list the current archives
 	auth := build.AzureBlobstoreConfig{
 		Account:   strings.Split(*store, "/")[0],
diff --git a/internal/build/env.go b/internal/build/env.go
index 15b2dfe418..c47681ebed 100644
--- a/internal/build/env.go
+++ b/internal/build/env.go
@@ -30,6 +30,7 @@ var (
 	GitTagFlag      = flag.String("git-tag", "", `Overrides git tag being built`)
 	BuildnumFlag    = flag.String("buildnum", "", `Overrides CI build number`)
 	PullRequestFlag = flag.Bool("pull-request", false, `Overrides pull request status of the build`)
+	CronJobFlag     = flag.Bool("cron-job", false, `Overrides cron job status of the build`)
 )
 
 // Environment contains metadata provided by the build environment.
@@ -39,6 +40,7 @@ type Environment struct {
 	Commit, Branch, Tag string // Git info
 	Buildnum            string
 	IsPullRequest       bool
+	IsCronJob           bool
 }
 
 func (env Environment) String() string {
@@ -59,6 +61,7 @@ func Env() Environment {
 			Tag:           os.Getenv("TRAVIS_TAG"),
 			Buildnum:      os.Getenv("TRAVIS_BUILD_NUMBER"),
 			IsPullRequest: os.Getenv("TRAVIS_PULL_REQUEST") != "false",
+			IsCronJob:     os.Getenv("TRAVIS_EVENT_TYPE") == "cron",
 		}
 	case os.Getenv("CI") == "True" && os.Getenv("APPVEYOR") == "True":
 		return Environment{
@@ -69,6 +72,7 @@ func Env() Environment {
 			Tag:           os.Getenv("APPVEYOR_REPO_TAG_NAME"),
 			Buildnum:      os.Getenv("APPVEYOR_BUILD_NUMBER"),
 			IsPullRequest: os.Getenv("APPVEYOR_PULL_REQUEST_NUMBER") != "",
+			IsCronJob:     os.Getenv("APPVEYOR_SCHEDULED_BUILD") == "True",
 		}
 	default:
 		return LocalEnv()
@@ -118,5 +122,8 @@ func applyEnvFlags(env Environment) Environment {
 	if *PullRequestFlag {
 		env.IsPullRequest = true
 	}
+	if *CronJobFlag {
+		env.IsCronJob = true
+	}
 	return env
 }