diff --git a/pkg/exec/exec.go b/pkg/exec/exec.go
index df46f6547..3e85ceb4c 100644
--- a/pkg/exec/exec.go
+++ b/pkg/exec/exec.go
@@ -5,10 +5,8 @@ import (
 	"io"
 	"os"
 	"os/exec"
-	"path/filepath"
 
 	"github.com/suzuki-shunsuke/go-timeout/timeout"
-	"golang.org/x/sys/unix"
 )
 
 type executor struct {
@@ -32,10 +30,6 @@ func New() Executor {
 	}
 }
 
-func (exe *executor) ExecXSys(exePath string, args []string) error {
-	return unix.Exec(exePath, append([]string{filepath.Base(exePath)}, args...), os.Environ()) //nolint:wrapcheck
-}
-
 func (exe *executor) command(cmd *exec.Cmd) *exec.Cmd {
 	cmd.Stdin = exe.stdin
 	cmd.Stdout = exe.stdout
diff --git a/pkg/exec/xsys.go b/pkg/exec/xsys.go
new file mode 100644
index 000000000..f3970bf05
--- /dev/null
+++ b/pkg/exec/xsys.go
@@ -0,0 +1,15 @@
+//go:build !windows
+// +build !windows
+
+package exec
+
+import (
+	"os"
+	"path/filepath"
+
+	"golang.org/x/sys/unix"
+)
+
+func (exe *executor) ExecXSys(exePath string, args []string) error {
+	return unix.Exec(exePath, append([]string{filepath.Base(exePath)}, args...), os.Environ()) //nolint:wrapcheck
+}
diff --git a/pkg/exec/xsys_windows.go b/pkg/exec/xsys_windows.go
new file mode 100644
index 000000000..69a204a8f
--- /dev/null
+++ b/pkg/exec/xsys_windows.go
@@ -0,0 +1,12 @@
+//go:build windows
+// +build windows
+
+package exec
+
+import "errors"
+
+var errXSysNotSuppported = errors.New("Windows doesn't support AQUA_EXPERIMENTAL_X_SYS_EXEC")
+
+func (exe *executor) ExecXSys(exePath string, args []string) error {
+	return errXSysNotSuppported
+}