If you have a kernel image package say linux-image-4.9.0-test, you may have have a header package linux-headers-4.9.0 (without the '-test' part) or some other similarly named package, right?
If you have a kernel image package say linux-image- 4.9.0-test, you may have have a header package linux-headers-4.9.0 (without the '-test' part) or some other similarly named package, right?