skalibs
- Do not use cross-compilation 
sysdepoptions inbuild, from INSTALL: 
Note that you can provide manual sysdeps values at any time, for any existing sysdep, to bypass autodetection - and you can even do it when building natively. It's just not recommended (you should let skalibs autodetect everything it can), and and it's only mandatory for a small subset of sysdeps in the cross-compilation case.- Remove 
--with-sysdep-grndinsecure=nobecause musl definesGRND_INSECURE