update:
Thanks for the help @mfalkvidd
I managed to get the make utility installed. Hopefully this will help anyone else running into this problem:
had to update and upgrade before it would work
apk update
...
apk upgrade
...
apk add build-base
I am still experiencing the Failed init system
[SECTION] Detecting target machine.
[OK] machine detected: SoC=BCM2836, Type=unknown, CPU=armv7l.
[SECTION] Detecting SPI driver.
[OK] SPI driver detected:BCM.
[SECTION] Detecting init system.
[FAILED] unknown init system.
[SECTION] Saving configuration.
[SECTION] Cleaning previous builds.
[OK] Finished.
Its like it doesn't know where my init files are. Digging around a little in the configure code, I see that the prefix is usr/local/
Should I change that to where my MySensors directory is? Or do I need to move the init scrips out of the initscripts directory?