Example of using variables to minimize duplication of path to Python Virtual Env in VS Code tasks.json

tasks.json

{
    // See https://go.microsoft.com/fwlink/?LinkId=733558
    // for the documentation about the tasks.json format
    "version": "2.0.0",
    "options": {
        "env": {
            // Path to VENV from home directory
            "PYTHON_VENV": "/.envs/myvirtualenv/bin/activate"
        }
    },
    "tasks": [
        {
            "label": "Run Make in VENV",
            "type": "shell",
            "command": "source ${userHome}$PYTHON_VENV && make some-target",
            "presentation": {
                "focus": true,
            },
            "problemMatcher": []
        }
    ]
}