Born in Zimbabwe, Nyoni moved to England in 2003 and joined Sheffield Wednesday just before his 16th birthday, making his professional debut in 2011 in a League Cup tie with Blackpool.
The 27-year-old has gone on to appear for the likes of Boston United, Frickley Athletic, Alfreton Town, Harrogate Town and Worksop Town.
Speaking of his latest move, he said: “I believe in the project that the club is building and the manager is striving towards. I just want to be part of this great plan that you’ve got in place and showcase what I can do as well."
Nailers manager Grant Black added: “He is a great addition for us. He is different to what we have in midfield and offers another great option.
“He’s big, strong, physical, athletic and runs hard with the ball.
“We are really happy to get Cecil sorted. He’s a great character and will offer the kind of personality we want associated with Belper Town.”
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