I'm unsuccessfully trying to install a Fritz!WLAN USB Stick on a Raspberry Pi 2 running Raspbian Stretch. Unfortunately, I have little experience with Linux. So far, entering
is giving me
Bus 001 Device 007: ID 05c:6201 AVM GmbH AVM Fritz!WLAN 1.1 [Texas Instruments TNETW1450]
from which I guess that the USB stick itself is recognized and
TNETW1450 is the name of the chipset. However, the instruction from here apparently doesn't work; the step
dkms build -m acx-mac80221 -v git
is giving me the following error message.
Error! echo Your kernel headers for kernel 4.9.41-v7+ cannot be found at /lib/modules/4.9.41-v7+/build or /lib/modules/4.9.41-v7+/source.
apt-cache search tnetw1450
is giving me no results. Does anyone know what to do? Is it possible to use the USB stick with Raspbian Stretch in the first place?
If it is relevant - connecting to a local network using the cable ethernet adapter works just fine.