private VariableDictionary AddEnvironmentVariables()
        {
            var variables = new CalamariVariableDictionary();
            var convention = new ContributeEnvironmentVariablesConvention();
            convention.Install(new RunningDeployment("C:\\Package.nupkg", variables));

            Assert.That(variables.GetNames().Count, Is.GreaterThan(3));
            Assert.That(variables.GetRaw(SpecialVariables.Tentacle.Agent.InstanceName), Is.EqualTo("#{env:TentacleInstanceName}"));
            return variables;
        }