diff --git a/tools/clean-repos/main.go b/tools/clean-repos/main.go
index 405898e..dec299a 100644
--- a/tools/clean-repos/main.go
+++ b/tools/clean-repos/main.go
@@ -19,33 +19,42 @@ func main() {
 	}
 
 	for _, f := range files {
+		if f.Name() != "github.com" {
+			continue
+		}
 		if f.IsDir() {
 			dirs, err := ioutil.ReadDir("_repos/src/" + f.Name())
 			if err != nil {
 				log.Fatal(err)
 			}
 			for _, d := range dirs {
-				path := "_repos/src/" + f.Name() + "/" + d.Name()
-				if time.Since(d.ModTime()) > 30*24*time.Hour {
-					if *real {
-						log.Printf("Deleting %s (repo is old)...", path)
-						os.RemoveAll(path)
-						continue
-					} else {
-						log.Printf("Would delete %s (repo is old)", path)
-					}
-				}
-
-				size, err := DirSize(path)
+				repos, err := ioutil.ReadDir("_repos/src/" + f.Name() + "/" + d.Name())
 				if err != nil {
 					log.Fatal(err)
 				}
-				if size < 15*1000*1000 {
-					if *real {
-						log.Printf("Deleting %s (dir size < 15M)...", path)
-						os.RemoveAll(path)
-					} else {
-						log.Printf("Would delete %s (dir size < 15M)", path)
+				for _, repo := range repos {
+					path := "_repos/src/" + f.Name() + "/" + d.Name() + "/" + repo.Name()
+					if time.Since(d.ModTime()) > 30*24*time.Hour {
+						if *real {
+							log.Printf("Deleting %s (repo is old)...", path)
+							os.RemoveAll(path)
+							continue
+						} else {
+							log.Printf("Would delete %s (repo is old)", path)
+						}
+					}
+
+					size, err := DirSize(path)
+					if err != nil {
+						log.Fatal(err)
+					}
+					if size < 15*1000*1000 {
+						if *real {
+							log.Printf("Deleting %s (dir size < 15M)...", path)
+							os.RemoveAll(path)
+						} else {
+							log.Printf("Would delete %s (dir size < 15M)", path)
+						}
 					}
 				}
 			}