fix: linux dev workflow

test/update_download_test.go

@@ -22,6 +22,7 @@ import (
 	"runtime"
 	"strings"
 	"sync"
+	"syscall"
 	"testing"
 	"time"
 )
@@ -470,7 +471,7 @@ func (r *downloadRig) waitForJob(states ...string) update.Job {
 
 func assertStagedDirGone(t *testing.T, rig *downloadRig) {
 	t.Helper()
-	if _, err := os.Stat(rig.stagedDir()); !os.IsNotExist(err) {
+	if _, err := os.Stat(rig.stagedDir()); !os.IsNotExist(err) && !errors.Is(err, syscall.ENOTDIR) {
 		t.Errorf("staged directory still exists: %v", err)
 	}
 }