Who told you that you absolutely need to use the haswell one? That's simply a build done with gcc -march=haswell. Use any .img.gz and try harder. There's tons of threads on this forum with the same issue.
Hi, is strange but seems that the only one that let work properly the wifi chip (7265) in my nuc is your Haswell build. After I tried your Haswell build I tried also tons of others build, but all with the same problem, slow connection and lots of drops. instead with your build I din't find any problems in regard wifi connection.