Build libks with yocto recipe

[tinu73]

I'm trying to build libks with a Yocto recipe

DESCRIPTION = "Foundational support for signalwire C products"
HOMEPAGE = "https://github.com/signalwire/libks"

LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://copyright;md5=5419284e41fbb9983fe7986a879b8224"

SRC_URI = "git://github.com/signalwire/libks;protocol=https;branch=master"

PV = "1.8.0+git${SRCPV}"
SRCREV = "25723366532d2244c362988748c87512fcafde4a"

S = "${WORKDIR}/git"

DEPENDS = "openssl util-linux"

inherit cmake

EXTRA_OECMAKE = "-DCMAKE_BUILD_TYPE=Release"

Basically the recipe has been create with recipetool create -V 1.8.0 https://github.com/signalwire/libks.

When i run bitbake libks, i get the following error

CMake Error at cmake_install.cmake:109 (file):
|   file INSTALL cannot find
|   "/home/.../rpi64/build/tmp/work/aarch64-poky-linux/libks/1.8.0+gitAUTOINC+2572336653-r0/build/copyright":
|   No such file or directory.

The ${WORKDIR}/git does contain the copyright file, but it seems its not copied in build folder. Do i miss something in my recipe?