如何在flatpak的PyQt5应用程序中添加图标？

from PyQt5.QtGui import QIcon

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        # 设置窗口图标
        icon = QIcon('icons/app_icon.png')
        self.setWindowIcon(icon)
        # ...

{
    "id": "com.example.myapp",
    "runtime": "org.freedesktop.Platform",
    "runtime-version": "20.08",
    "sdk": "org.freedesktop.Sdk",
    "command": "python3",
    "modules": [
        {
            "name": "myapp",
            "buildsystem": "simple",
            "build-commands": [
                "python3 setup.py install --prefix=/app"
            ],
            "sources": [
                {
                    "type": "git",
                    "url": "https://github.com/example/myapp.git",
                    "branch": "master"
                }
            ],
            "build-options": {
                "prefix": "/app"
            },
            "cleanup": [
                "/app/share/man"
            ]
        },
        {
            "name": "icons",
            "buildsystem": "simple",
            "sources": [
                {
                    "type": "dir",
                    "path": "icons"
                }
            ]
        }
    ]
}