Ethernet drivers won't install - 10.12.6

Trying to make Sierra run decently on a Dell Inspiron 5437. Got everything nicely so far, except wifi/bluetooth (not supported AFAIK), plus graphics which are a bit iffy as of now (mostly due to an issue with Clover. The dedicated GPU this laptop has is not supported either.)
The Ethernet controller, however, just won't work no matter what. I've tried deleting them from /System/Library/Extensions, rebuilding and re-installing many times; tried adding to EFI/Clover/kexts/Other just to see what happens, and nothing. What am I doing wrong?
The Ethernet adapter in question is a Realtek RTL8106EUS, and I'm using the kext from this post.

submitted by /u/RenderedKnave
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