diff --git a/cmd/build.go b/cmd/build.go
new file mode 100644
index 000000000..2d9991820
--- /dev/null
+++ b/cmd/build.go
@@ -0,0 +1,213 @@
+// Copyright 2013 gopm authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package cmd
+
+import (
+	"errors"
+	"github.com/Unknwon/com"
+	"github.com/gpmgo/gopm/doc"
+	"go/build"
+	"os"
+	"path/filepath"
+	//"syscall"
+	"os/exec"
+	"strings"
+)
+
+var CmdBuild = &Command{
+	UsageLine: "build",
+	Short:     "build according a gopmfile",
+	Long: `
+build
+`,
+}
+
+func init() {
+	CmdBuild.Run = runBuild
+	CmdBuild.Flags = map[string]bool{}
+}
+
+func printBuildPrompt(flag string) {
+}
+
+func getGopmPkgs(path string, inludeSys bool) (map[string]*doc.Pkg, error) {
+	abs, err := filepath.Abs(doc.GopmFileName)
+	if err != nil {
+		return nil, err
+	}
+
+	// load import path
+	gf := doc.NewGopmfile()
+	if com.IsExist(abs) {
+		err := gf.Load(abs)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		sec := doc.NewSection()
+		sec.Name = "build"
+		gf.Sections[sec.Name] = sec
+	}
+
+	var builds *doc.Section
+	var ok bool
+	if builds, ok = gf.Sections["build"]; !ok {
+		return nil, errors.New("no found build section\n")
+	}
+
+	pkg, err := build.ImportDir(path, build.AllowBinary)
+	if err != nil {
+		return map[string]*doc.Pkg{}, err
+	}
+
+	pkgs := make(map[string]*doc.Pkg)
+	for _, name := range pkg.Imports {
+		if inludeSys || !isStdPkg(name) {
+			if dep, ok := builds.Deps[name]; ok {
+				pkgs[name] = dep.Pkg
+			} else {
+				pkgs[name] = doc.NewDefaultPkg(name)
+			}
+		}
+	}
+	return pkgs, nil
+}
+
+func pkgInCache(name string, cachePkgs map[string]*doc.Pkg) bool {
+	//pkgs := strings.Split(name, "/")
+	_, ok := cachePkgs[name]
+	return ok
+}
+
+func getChildPkgs(cpath string, ppkg *doc.Pkg, cachePkgs map[string]*doc.Pkg) error {
+	pkgs, err := getGopmPkgs(cpath, false)
+	if err != nil {
+		return err
+	}
+	for name, pkg := range pkgs {
+		if !pkgInCache(name, cachePkgs) {
+			newPath := filepath.Join(installRepoPath, pkg.ImportPath)
+			if !com.IsExist(newPath) {
+				var t, ver string = doc.BRANCH, ""
+				node := doc.NewNode(pkg.ImportPath, pkg.ImportPath, t, ver, true)
+				//node := new(doc.Node)
+				//node.Pkg = *pkg
+
+				nodes := []*doc.Node{node}
+				downloadPackages(nodes)
+				// should handler download failed
+			}
+			err = getChildPkgs(newPath, pkg, cachePkgs)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	if ppkg != nil {
+		cachePkgs[ppkg.ImportPath] = ppkg
+	}
+	return nil
+}
+
+func makeLink(oldPath, newPath string) error {
+	cmd := exec.Command("ln", "-s", oldPath, newPath)
+	return cmd.Run()
+}
+
+func runBuild(cmd *Command, args []string) {
+	curPath, err := os.Getwd()
+	if err != nil {
+		com.ColorLog("[ERRO] %v\n", err)
+		return
+	}
+
+	hd, err := com.HomeDir()
+	if err != nil {
+		com.ColorLog("[ERRO] Fail to get current user[ %s ]\n", err)
+		return
+	}
+
+	installRepoPath = strings.Replace(reposDir, "~", hd, -1)
+
+	cachePkgs := make(map[string]*doc.Pkg)
+	err = getChildPkgs(curPath, nil, cachePkgs)
+	if err != nil {
+		com.ColorLog("[ERRO] %v\n", err)
+		return
+	}
+
+	newGoPath := filepath.Join(curPath, "vendor")
+	os.RemoveAll(newGoPath)
+	newGoPathSrc := filepath.Join(newGoPath, "src")
+	os.MkdirAll(newGoPathSrc, os.ModePerm)
+
+	for name, pkg := range cachePkgs {
+		oldPath := filepath.Join(installRepoPath, name)
+		newPath := filepath.Join(newGoPathSrc, name)
+		paths := strings.Split(name, "/")
+		var isExistP bool
+		for i := 0; i < len(paths)-1; i++ {
+			pName := filepath.Join(paths[:len(paths)-1-i]...)
+			if _, ok := cachePkgs[pName]; ok {
+				isExistP = true
+				break
+			}
+		}
+
+		if !isExistP {
+			pName := filepath.Join(paths[:len(paths)-1]...)
+			newPPath := filepath.Join(newGoPathSrc, pName)
+			com.ColorLog("[TRAC] create dirs %v\n", newPPath)
+			os.MkdirAll(newPPath, os.ModePerm)
+
+			com.ColorLog("[INFO] linked %v\n", name)
+
+			err = makeLink(oldPath, newPath)
+
+			if err != nil {
+				com.ColorLog("[ERRO] make link error %v\n", err)
+				return
+			}
+		}
+	}
+
+	gopath := build.Default.GOPATH
+	com.ColorLog("[TRAC] set GOPATH=%v\n", newGoPath)
+	err = os.Setenv("GOPATH", newGoPath)
+	if err != nil {
+		com.ColorLog("[ERRO] %v\n", err)
+		return
+	}
+
+	cmdArgs := []string{"go", "build"}
+	cmdArgs = append(cmdArgs, args...)
+	bCmd := exec.Command(cmdArgs[0], cmdArgs[1:]...)
+	bCmd.Stdout = os.Stdout
+	bCmd.Stderr = os.Stderr
+	err = bCmd.Run()
+	if err != nil {
+		com.ColorLog("[ERRO] build failed: %v\n", err)
+		return
+	}
+
+	com.ColorLog("[TRAC] set GOPATH=%v\n", gopath)
+	err = os.Setenv("GOPATH", gopath)
+	if err != nil {
+		com.ColorLog("[ERRO] %v\n", err)
+		return
+	}
+
+	com.ColorLog("[SUCC] build successfully!\n")
+}
diff --git a/cmd/get.go b/cmd/get.go
index 6ae456e8c..c678c9118 100644
--- a/cmd/get.go
+++ b/cmd/get.go
@@ -141,13 +141,8 @@ func runGet(cmd *Command, args []string) {
 		}
 	}
 
-	nodes = append(nodes, &doc.Node{
-		ImportPath:  args[0],
-		DownloadURL: args[0],
-		Type:        t,
-		Value:       ver,
-		IsGetDeps:   true,
-	})
+	node := doc.NewNode(args[0], args[0], t, ver, true)
+	nodes = append(nodes, node)
 
 	// Download package(s).
 	downloadPackages(nodes)
@@ -185,12 +180,7 @@ func downloadPackages(nodes []*doc.Node) {
 					// Generate temporary nodes.
 					nodes := make([]*doc.Node, len(imports))
 					for i := range nodes {
-						nodes[i] = &doc.Node{
-							ImportPath:  imports[i],
-							DownloadURL: imports[i],
-							Type:        doc.BRANCH,
-							IsGetDeps:   true,
-						}
+						nodes[i] = doc.NewNode(imports[i], imports[i], doc.BRANCH, "", true)
 					}
 					downloadPackages(nodes)
 				}
diff --git a/cmd/service.go b/cmd/service.go
index 11f0bf19e..b6d56dba1 100644
--- a/cmd/service.go
+++ b/cmd/service.go
@@ -29,11 +29,11 @@ package cmd
 // 	PkgExt() string
 // }
 
-// type Pkg struct {
-// 	Name  string
-// 	Ver   string
-// 	VerId string
-// }
+//type Pkg struct {
+//	Name  string
+//	Ver   string
+//	VerId string
+//}
 
 // func NewPkg(pkgName string, ver string) *Pkg {
 // 	vers := strings.Split(ver, ":")
diff --git a/doc/doc b/doc/doc
new file mode 120000
index 000000000..9be75f6a1
--- /dev/null
+++ b/doc/doc
@@ -0,0 +1 @@
+/Users/lunny/go/src/github.com/gpmgo/gopm/doc
\ No newline at end of file
diff --git a/doc/gopmfile.go b/doc/gopmfile.go
new file mode 100644
index 000000000..f08101116
--- /dev/null
+++ b/doc/gopmfile.go
@@ -0,0 +1,99 @@
+package doc
+
+import (
+	"bufio"
+	"errors"
+	"os"
+	"strings"
+)
+
+const (
+	Greater     = ">"
+	GreaterOrEq = ">="
+	Equeal      = "="
+	Lesser      = "<"
+	LesserOrEq  = "<="
+)
+
+var (
+	Ops = []string{GreaterOrEq, LesserOrEq, Greater, Equeal, Lesser}
+)
+
+const (
+	GopmFileName = ".gopmfile"
+)
+
+type Depend struct {
+	Pkg *Pkg
+	Op  string
+	Ver string
+}
+
+type Section struct {
+	Name string
+	Deps map[string]*Depend
+}
+
+func NewSection() *Section {
+	return &Section{Deps: make(map[string]*Depend)}
+}
+
+type Gopmfile struct {
+	Sections map[string]*Section
+}
+
+func NewGopmfile() *Gopmfile {
+	return &Gopmfile{Sections: make(map[string]*Section)}
+}
+
+func (this *Gopmfile) Load(path string) error {
+	f, err := os.Open(path)
+	if err != nil {
+		return err
+	}
+
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		var sec *Section
+		text := strings.TrimSpace(scanner.Text())
+		if strings.HasPrefix(text, "[") {
+			sec = NewSection()
+			if strings.HasSuffix(text, "]") {
+				sec.Name = text[1 : len(text)-1]
+			} else {
+				return errors.New("need section")
+			}
+			this.Sections[sec.Name] = sec
+		} else {
+			if sec == nil {
+				continue
+			}
+
+			var dep *Depend
+			for _, op := range Ops {
+				if strings.Contains(text, op) {
+					ss := strings.Split(text, op)
+					pkver := strings.Split(ss[1], ":")
+					var tp, value string
+					tp = pkver[0]
+					if len(pkver) == 2 {
+						value = pkver[1]
+					}
+					dep = &Depend{NewPkg(ss[0], tp, value), ss[1], value}
+					break
+				}
+			}
+
+			if dep == nil {
+				dep = &Depend{NewDefaultPkg(text), Equeal, ""}
+			}
+			sec.Deps[dep.Pkg.ImportPath] = dep
+		}
+	}
+
+	return nil
+}
+
+func (this *Gopmfile) Save(path string) error {
+	return nil
+}
diff --git a/doc/struct.go b/doc/struct.go
index c8e3e2077..94ca77b16 100644
--- a/doc/struct.go
+++ b/doc/struct.go
@@ -32,20 +32,43 @@ const (
 	COMMIT  = "commit"
 )
 
+type Pkg struct {
+	ImportPath string
+	Type       string
+	Value      string // Branch, tag or commit.
+}
+
+func (pkg *Pkg) VerString() string {
+	if pkg.Value == "" {
+		return pkg.Type
+	}
+	return fmt.Sprintf("%v:%v", pkg.Type, pkg.Value)
+}
+
+func NewPkg(importPath, tp, value string) *Pkg {
+	return &Pkg{importPath, tp, value}
+}
+
+func NewDefaultPkg(importPath string) *Pkg {
+	return NewPkg(importPath, BRANCH, "")
+}
+
 type Node struct {
-	ImportPath  string
+	Pkg
 	DownloadURL string
-	Type        string
-	Value       string // Branch, tag or commit.
 	Synopsis    string
 	IsGetDeps   bool
 }
 
-func (nod *Node) VerString() string {
-	if nod.Value == "" {
-		return nod.Type
+func NewNode(importPath, downloadUrl, tp, value string, isGetDeps bool) *Node {
+	return &Node{
+		Pkg: Pkg{ImportPath: importPath,
+			Type:  tp,
+			Value: value,
+		},
+		DownloadURL: downloadUrl,
+		IsGetDeps:   isGetDeps,
 	}
-	return fmt.Sprintf("%v:%v", nod.Type, nod.Value)
 }
 
 // source is source code file.
diff --git a/gopm.go b/gopm.go
index 13a91f1c0..55a5d273a 100644
--- a/gopm.go
+++ b/gopm.go
@@ -46,8 +46,8 @@ var commands = []*cmd.Command{
 	cmd.CmdSearch,
 	cmd.CmdServe,
 	cmd.CmdGen,
+	cmd.CmdBuild,
 	/*
-		cmdBuild,
 		cmdClean,
 		cmdDoc,
 		cmdEnv,
@@ -140,7 +140,7 @@ Use "gopm help [topic]" for more information about that topic.
 
 `
 
-var helpTemplate = `{{if .Runnable}}usage: go {{.UsageLine}}
+var helpTemplate = `{{if .Runnable}}usage: gopm {{.UsageLine}}
 
 {{end}}{{.Long | trim}}
 `