@kirby @munir @MK2boogaloo @lina @RustyCrab @PurpCat That is basically how the PKGBUILD (for pleroma-bin at least) works:

package() {
cd "$srcdir"

mkdir -p "${pkgdir}/opt/pleroma"
find release -executable -exec chmod a+rx {} \;
cp -r release/* "${pkgdir}/opt/pleroma"
install -Dm 644 pleroma.sysusers "${pkgdir}/usr/lib/sysusers.d/pleroma.conf"
install -Dm 644 pleroma.tmpfiles "${pkgdir}/usr/lib/tmpfiles.d/pleroma.conf"
install -Dm 644 pleroma.service "${pkgdir}/usr/lib/systemd/system/pleroma.service"
install -Dm 644 COPYING "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
}