diff --git a/cmd/bin.go b/cmd/bin.go
index 9daddf3b6..04994ae48 100644
--- a/cmd/bin.go
+++ b/cmd/bin.go
@@ -43,6 +43,7 @@ contains main package`,
 	Action: runBin,
 	Flags: []cli.Flag{
 		cli.BoolFlag{"dir, d", "build binary to given directory(second argument)"},
+		cli.BoolFlag{"force, f", "force to update pakcage(s) and dependencies"},
 	},
 }
 
@@ -133,7 +134,7 @@ func runBin(ctx *cli.Context) {
 	}
 	defer func() {
 		// Clean files.
-		os.RemoveAll(path.Join(repoPath, VENDOR))
+		os.RemoveAll(path.Join(repoPath, doc.VENDOR))
 	}()
 
 	// Check if previous steps were successful.
@@ -156,7 +157,7 @@ func runBin(ctx *cli.Context) {
 	if runtime.GOOS == "windows" {
 		binName += ".exe"
 	}
-	binPath := path.Join(VENDOR, "src", pkgPath, binName)
+	binPath := path.Join(doc.VENDOR, "src", pkgPath, binName)
 	if !com.IsFile(binPath) {
 		log.Error("Bin", "Fail to continue command")
 		log.Fatal("", "Previous steps weren't successful or the project does not contain main package")
diff --git a/cmd/build.go b/cmd/build.go
index 0a5a4fe96..9de4d13a6 100644
--- a/cmd/build.go
+++ b/cmd/build.go
@@ -20,6 +20,7 @@ import (
 
 	"github.com/codegangsta/cli"
 
+	"github.com/gpmgo/gopm/doc"
 	"github.com/gpmgo/gopm/log"
 )
 
@@ -49,7 +50,7 @@ func runBuild(ctx *cli.Context) {
 	if isWindowsXP {
 		binName := pkgName + ".exe"
 		os.Remove(binName)
-		err = os.Rename(path.Join(VENDOR, "src", pkgName, binName), binName)
+		err = os.Rename(path.Join(doc.VENDOR, "src", pkgName, binName), binName)
 		if err != nil {
 			log.Error("Build", "Fail to move binary")
 			log.Fatal("", err.Error())
diff --git a/cmd/gopath.go b/cmd/gopath.go
index 4fadd9020..4a903ab08 100644
--- a/cmd/gopath.go
+++ b/cmd/gopath.go
@@ -15,8 +15,6 @@ import (
 	"github.com/gpmgo/gopm/log"
 )
 
-const VENDOR = ".vendor"
-
 var isWindowsXP = false
 
 func getGopmPkgs(dirPath string, isTest bool) (pkgs map[string]*doc.Pkg, err error) {
@@ -214,7 +212,7 @@ func genNewGoPath(ctx *cli.Context, isTest bool) {
 		log.Fatal("", err.Error())
 	}
 
-	newGoPath = filepath.Join(curPath, VENDOR)
+	newGoPath = filepath.Join(curPath, doc.VENDOR)
 	newGoPathSrc := filepath.Join(newGoPath, "src")
 	os.RemoveAll(newGoPathSrc)
 	os.MkdirAll(newGoPathSrc, os.ModePerm)
diff --git a/cmd/install.go b/cmd/install.go
index 5973ba60f..5bebc736a 100644
--- a/cmd/install.go
+++ b/cmd/install.go
@@ -15,6 +15,8 @@
 package cmd
 
 import (
+	"path/filepath"
+
 	"github.com/Unknwon/com"
 	"github.com/codegangsta/cli"
 
@@ -35,6 +37,7 @@ If no argument is supplied, then gopmfile must be present`,
 	Action: runInstall,
 	Flags: []cli.Flag{
 		cli.BoolFlag{"verbose, v", "show process details"},
+		cli.BoolFlag{"pkg, p", "only install non-main packages"},
 	},
 }
 
@@ -57,22 +60,33 @@ func runInstall(ctx *cli.Context) {
 
 	genNewGoPath(ctx, false)
 
-	if len(target) == 0 {
-		target = pkgName
+	var installRepos []string
+	if ctx.Bool("pkg") {
+		curPath, _ := filepath.Abs(".")
+		installRepos = doc.GetAllImports([]string{curPath},
+			".", ctx.Bool("example"))
+	} else {
+		if len(target) == 0 {
+			target = pkgName
+		}
+
+		installRepos = []string{target}
 	}
 
 	log.Trace("Installing...")
 
-	cmdArgs := []string{"go", "install"}
+	for _, repo := range installRepos {
+		cmdArgs := []string{"go", "install"}
 
-	if ctx.Bool("verbose") {
-		cmdArgs = append(cmdArgs, "-v")
-	}
-	cmdArgs = append(cmdArgs, target)
-	err := execCmd(newGoPath, newCurPath, cmdArgs...)
-	if err != nil {
-		log.Error("Install", "Fail to install program")
-		log.Fatal("", err.Error())
+		if ctx.Bool("verbose") {
+			cmdArgs = append(cmdArgs, "-v")
+		}
+		cmdArgs = append(cmdArgs, repo)
+		err := execCmd(newGoPath, newCurPath, cmdArgs...)
+		if err != nil {
+			log.Error("Install", "Fail to install program")
+			log.Fatal("", err.Error())
+		}
 	}
 
 	log.Success("SUCC", "Install", "Command execute successfully!")
diff --git a/doc/utils.go b/doc/utils.go
index b0daae599..7cc054e83 100644
--- a/doc/utils.go
+++ b/doc/utils.go
@@ -26,6 +26,8 @@ import (
 	"github.com/gpmgo/gopm/log"
 )
 
+const VENDOR = ".vendor"
+
 // GetDirsInfo returns os.FileInfo of all sub-directories in root path.
 func GetDirsInfo(rootPath string) []os.FileInfo {
 	rootDir, err := os.Open(rootPath)
@@ -59,7 +61,7 @@ func GetImports(absPath, importPath string, example bool) []string {
 
 	dirs := make([]string, 0)
 	for _, fi := range fis {
-		if fi.IsDir() {
+		if fi.IsDir() && !strings.Contains(fi.Name(), VENDOR) {
 			dirs = append(dirs, absPath+fi.Name())
 		}
 	}