rendered output is nested further into the array with each call

[speciesunknown]

Hello

I'm finding that if there is more than one call to render the same template file, the results get nested further into an array with each call.
swig template:

select {% bind fn %} AS solution

js code:

var swigql = require('swigql');

var params = {
    fn: 'J\'ames',
    last_names: ['Franklin', 'Cooper', 'Smitty', 'Black']
};

var tmpl1 = swigql.compileFile(process.cwd() + "/example.sql");
console.log(tmpl1.render(params));

var tmpl2 = swigql.compileFile(process.cwd() + "/example.sql");
console.log(tmpl2.render(params));

$ node test.js
[ 'select $1 AS solution', [ 'J\'ames' ] ]
[ [ 'select $1 AS solution', [ 'J\'ames' ] ], [ 'J\'ames' ] ]