src/cmd/goinstall/download.go | 4 +++-

diff --git a/src/cmd/goinstall/download.go b/src/cmd/goinstall/download.go
index 67f389abac190826fe771857dc7e14e117bec132..13a2f65ab855ecdd63a4bebbb14b54060cc9fb97 100644
--- a/src/cmd/goinstall/download.go
+++ b/src/cmd/goinstall/download.go
@@ -9,6 +9,7 @@
 import (
 	"http"
 	"os"
+	"path"
 	"regexp"
 	"strings"
 )
@@ -130,7 +131,8 @@ 	if err == nil && !dir.IsDirectory() {
 		return os.ErrorString("not a directory: " + dst)
 	}
 	if err != nil {
-		if err := os.MkdirAll(dst, 0777); err != nil {
+		parent, _ := path.Split(dst)
+		if err := os.MkdirAll(parent, 0777); err != nil {
 			return err
 		}
 		if err := run("/", nil, vcs.cmd, vcs.clone, repo, dst); err != nil {