Build jsonnet with musl static binary

Is there a way to build jsonnet with `musl`?

I am a novice in C++ development and I try to build `jsonnet` with `musl` in order to create a static binary (here the root issue https://github.com/anguslees/rust-jsonnet/issues/40).

I updated the [Dockerfile:L10](https://github.com/google/jsonnet/blob/master/Dockerfile#L10) with adding `CC="musl-gcc -static"`
```Dockerfile
...
RUN cd jsonnet && \
CC="musl-gcc -static" && make
...
```
The build pass :heavy_check_mark: .

Is it enough to guarantee that `jsonnet` build with `musl`?