diff --git a/bootstrap/bootstrap.go b/bootstrap/bootstrap.go
index 0d548d5..3b04fb1 100644
--- a/bootstrap/bootstrap.go
+++ b/bootstrap/bootstrap.go
@@ -10,6 +10,7 @@ import (
 	"io/ioutil"
 	"os"
 	"os/exec"
+	"path/filepath"
 )
 
 const genPackage = "github.com/mailru/easyjson/gen"
@@ -72,11 +73,13 @@ func (g *Generator) writeStub() error {
 
 // writeMain creates a .go file that launches the generator if 'go run'.
 func (g *Generator) writeMain() (path string, err error) {
-	f, err := ioutil.TempFile("", "easyjson")
+	f, err := ioutil.TempFile(filepath.Dir(g.OutName), "easyjson-bootstrap")
 	if err != nil {
 		return "", err
 	}
 
+	fmt.Fprintln(f, "// +build ignore")
+	fmt.Fprintln(f)
 	fmt.Fprintln(f, "// TEMPORARY AUTOGENERATED FILE: easyjson bootstapping code to launch")
 	fmt.Fprintln(f, "// the actual generator.")
 	fmt.Fprintln(f)