diff --git a/pkg/build/goenv.go b/pkg/build/goenv.go
index ed9a679..b1278a5 100644
--- a/pkg/build/goenv.go
+++ b/pkg/build/goenv.go
@@ -1,13 +1,15 @@
 package build
 
 import (
+	"bytes"
+	"encoding/json"
+	"io"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"strings"
 
 	"github.com/qiniu/goc/v2/pkg/config"
-	"github.com/qiniu/goc/v2/pkg/cover"
 	"github.com/qiniu/goc/v2/pkg/log"
 )
 
@@ -17,7 +19,7 @@ func (b *Build) readProjectMetaInfo() {
 	config.GocConfig.GOPATH = b.readGOPATH()
 	config.GocConfig.GOBIN = b.readGOBIN()
 	// 获取当前目录及其依赖的 package list
-	config.GocConfig.Pkgs = cover.ListPackages(config.GocConfig.CurPkgDir)
+	config.GocConfig.Pkgs = b.listPackages(config.GocConfig.CurPkgDir)
 
 	// get mod info
 	pkgs := config.GocConfig.Pkgs
@@ -66,3 +68,40 @@ func (b *Build) readGOBIN() string {
 	}
 	return strings.TrimSpace(string(out))
 }
+
+// listPackages list all packages under specific via go list command.
+func (b *Build) listPackages(dir string) map[string]*config.Package {
+	cmd := exec.Command("go", "list", "-json", "./...")
+	cmd.Dir = dir
+
+	var errBuf bytes.Buffer
+	cmd.Stderr = &errBuf
+	out, err := cmd.Output()
+	if err != nil {
+		log.Fatalf("execute go list -json failed, err: %v, stdout: %v, stderr: %v", err, string(out), errBuf.String())
+	}
+	// 有些时候 go 命令会打印一些信息到 stderr，但其实命令整体是成功运行了
+	if errBuf.String() != "" {
+		log.Errorf("%v", errBuf.String())
+	}
+
+	dec := json.NewDecoder(bytes.NewBuffer(out))
+	pkgs := make(map[string]*config.Package, 0)
+
+	for {
+		var pkg config.Package
+		if err := dec.Decode(&pkg); err != nil {
+			if err == io.EOF {
+				break
+			}
+			log.Fatalf("reading go list output error: %v", err)
+		}
+		if pkg.Error != nil {
+			log.Fatalf("list package %s failed with output: %v", pkg.ImportPath, pkg.Error)
+		}
+
+		pkgs[pkg.ImportPath] = &pkg
+	}
+
+	return pkgs
+}
diff --git a/pkg/cover/list.go b/pkg/cover/list.go
deleted file mode 100644
index 3b6b8ce..0000000
--- a/pkg/cover/list.go
+++ /dev/null
@@ -1,56 +0,0 @@
-package cover
-
-import (
-	"bytes"
-	"encoding/json"
-	"errors"
-	"io"
-	"os/exec"
-
-	"github.com/qiniu/goc/v2/pkg/config"
-	"github.com/qiniu/goc/v2/pkg/log"
-)
-
-var (
-	// ErrCoverPkgFailed represents the error that fails to inject the package
-	ErrCoverPkgFailed = errors.New("fail to inject code to project")
-	// ErrCoverListFailed represents the error that fails to list package dependencies
-	ErrCoverListFailed = errors.New("fail to list package dependencies")
-)
-
-// ListPackages list all packages under specific via go list command.
-func ListPackages(dir string) map[string]*config.Package {
-	cmd := exec.Command("go", "list", "-json", "./...")
-	cmd.Dir = dir
-
-	var errBuf bytes.Buffer
-	cmd.Stderr = &errBuf
-	out, err := cmd.Output()
-	if err != nil {
-		log.Fatalf("execute go list -json failed, err: %v, stdout: %v, stderr: %v", err, string(out), errBuf.String())
-	}
-	// 有些时候 go 命令会打印一些信息到 stderr，但其实命令整体是成功运行了
-	if errBuf.String() != "" {
-		log.Errorf("%v", errBuf.String())
-	}
-
-	dec := json.NewDecoder(bytes.NewBuffer(out))
-	pkgs := make(map[string]*config.Package, 0)
-
-	for {
-		var pkg config.Package
-		if err := dec.Decode(&pkg); err != nil {
-			if err == io.EOF {
-				break
-			}
-			log.Fatalf("reading go list output error: %v", err)
-		}
-		if pkg.Error != nil {
-			log.Fatalf("list package %s failed with output: %v", pkg.ImportPath, pkg.Error)
-		}
-
-		pkgs[pkg.ImportPath] = &pkg
-	}
-
-	return pkgs
-}