diff --git a/muzan.go b/muzan.go
index 2ec21cc..3a2d993 100644
--- a/muzan.go
+++ b/muzan.go
@@ -77,7 +77,7 @@ func (oni *Oni) Start() error {
 	}
 	var err error
 	cmd := exec.Command(oni.Cmd, oni.Args...)
-	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+	setgpid(cmd)
 	cmd.Env = oni.Envs
 	cmd.Dir = oni.Dir
 	var out io.Writer
@@ -111,18 +111,6 @@ func (oni *Oni) Stop() error {
 	return oni.cmd.Process.Signal(syscall.SIGTERM)
 }
 
-func (oni *Oni) Kill() error {
-	if oni.cmd == nil {
-		return nil
-	}
-	pgid, err := syscall.Getpgid(oni.cmd.Process.Pid)
-	if err == nil {
-		return syscall.Kill(-pgid, 15) // note the minus sign
-	}
-	return oni.cmd.Process.Kill()
-	// return oni.cmd.Process.Kill()
-}
-
 func (oni *Oni) end(v interface{}) {
 	if v == nil {
 		oni.StateChange(ENDED)
diff --git a/muzanctl.go b/muzanctl.go
new file mode 100644
index 0000000..2cd2e1e
--- /dev/null
+++ b/muzanctl.go
@@ -0,0 +1,24 @@
+//go:build !windows
+// +build !windows
+
+package configui
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+func setgpid(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+}
+
+func (oni *Oni) Kill() error {
+	if oni.cmd == nil {
+		return nil
+	}
+	pgid, err := syscall.Getpgid(oni.cmd.Process.Pid)
+	if err == nil {
+		return syscall.Kill(-pgid, 15) // note the minus sign
+	}
+	return oni.cmd.Process.Kill()
+}
diff --git a/muzanctrl_windows.go b/muzanctrl_windows.go
new file mode 100644
index 0000000..64a8953
--- /dev/null
+++ b/muzanctrl_windows.go
@@ -0,0 +1,13 @@
+package configui
+
+import "os/exec"
+
+func setgpid(cmd *exec.Cmd) {
+}
+
+func (oni *Oni) Kill() error {
+	if oni.cmd == nil {
+		return nil
+	}
+	return oni.cmd.Process.Kill()
+}