Winger Calvin Miller has agreed to join the Spireites.
Manager James Rowe said; “Calvin is a player I have tracked since early 2021 in the hope that I could lure him to our club.
“Despite keen interest elsewhere, I’m delighted he has chosen to commit his future to us.”
The 23-year-old Scot, who played against Chesterfield for Notts County in the play-offs, will complete his move when the transfer window opens on July 1.
Miller had been on loan at Notts from Harrogate.