Following up on this:

Subject: RE: Is 'shanty' derived from 'chanson'
From: GUEST,Phil d'Conch
Date: 04 Jun 18 - 07:22 PM
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The French Colonial shanty is short for “camboose shanty,” (or similar,) which is a corruption of caboose chantier. Shanty takes its pronunciation (soft "ch", mostly silent “r”) from the latter and definition (cabin) from the former.

Chantier was a generic for construction site with lumber and shipyards being tops. The nautical caboose was a kind of deckhouse. A shanty on a flatbed railcar (shanty car) was an old school caboose. The Colonial usage has morphed from kitchen/galley, mess hall, cantine, commissary, bunkhouse, cabin &c over the decades. In Creole it's a cabana.

The French root is cabane: f. A cote, or cottage; also, a shed, or cabine, made of boughs.