@Jonathan-Zwart I have a solution to the 10.13.1 problem with m4 you've encountered (see my answer to your post in the openwrt forum and/or the question/solution in the lede forum from late 2017) But it does not seem to be related to the OP's problem on WSL to me. From @Elliot-477569 's last post I rather conclude his original problem was a file system issue. I still have a unresolved strange issue with make leaving out parts of the build of the mt76 wifi driver when building LEDE master on macOS 10.13.1, resulting in an image with everything working, except that the entire mac80211 infrastructure is missing. The reason behind must be a similar subtlety like in @Elliot-477569 's case on WSL, that's why I subscribed to this thread in the first place... Any ideas are welcome