There is a difference between doing God's will IN ORDER TO BECOME SAVED: John 6:40 - For my Father’s will is that everyone who looks to the Son and believes in him shall have eternal life, and I will raise them up at the last day.
AND
Doing God's will AFTER WE HAVE BEEN SAVED: 1 Thessalonians 5:14 - Now we exhort you, brethren, warn those who are unruly, comfort the fainthearted, uphold the weak, be patient with all. 15 See that no one renders evil for evil to anyone, but always pursue what is good both for yourselves and for all. 16 Rejoice always, 17 pray without ceasing, 18 in everything give thanks; for this is the will of God in Christ Jesus for you.
Works-salvationists generally define faith "as" obedience, then try to deny that performing acts of obedience (which follow faith) are works.