File not found error while executing gunicorn command

[divaybansal]

Below is our gradle setup

buildscript {
    dependencies {
        classpath group: 'com.linkedin.pygradle', name: 'pygradle-plugin', version: '0.12.10'
    }
}
apply plugin: 'com.linkedin.python-web-app'

python {
    testDir = file('tests')
    srcDir = file('src/main/python')
    forceVersion("pypi:flake8:3.2.1")
    if (project.hasProperty("PYTHON_VERSION")) {
        details.pythonVersion = project.get("PYTHON_VERSION")
    }
    if (project.hasProperty("PYTHON_PATH")) {
        details.systemPythonInterpreter = project.get("PYTHON_PATH")
    }

}

We have a Jenkins server that has default python 2.7. We have installed additional python plugin 3.7 but it is not Jenkins server default.

We set the systemPythonInterpreter and pythonVersion values correctly to version 3.7. When we run the gunicorn command this fails with

/usr/bin/env: /opt/path/bin/microservice_appl.pex: No such file or directory

When we build on a local windows machine with only python version 3.7 installed a gunicorn.py file is correctly built and the installation works fine.