c++ make failing on forward declaration - running in docker

[Raycoms]

FROM alpine:latest
RUN apk update
RUN apk add --no-cache git gcc g++ make cmake libuv-dev openssl-dev gmp-dev libsodium-dev autoconf
RUN git clone https://github.com/hot-stuff/libhotstuff.git && cd libhotstuff/ && git submodule update --init --recursive
RUN cd libhotstuff && cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED=ON -DHOTSTUFF_PROTO_LOG=ON && make

When running it in docker like this, I get:

In file included from /libhotstuff/include/hotstuff/util.h:21,
                 from /libhotstuff/src/util.cpp:17:
/libhotstuff/salticidae/include/salticidae/util.h:244:20: error: field 't0' has incomplete type 'salticidae::timeval'
  244 |     struct timeval t0;
      |                    ^~
/libhotstuff/salticidae/include/salticidae/util.h:71:30: note: forward declaration of 'struct salticidae::timeval'
   71 | void sec2tv(double t, struct timeval &tv);
      |                              ^~~~~~~
make[2]: *** [CMakeFiles/hotstuff.dir/build.make:82: CMakeFiles/hotstuff.dir/src/util.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:289: CMakeFiles/hotstuff.dir/all] Error 2
make: *** [Makefile:149: all] Error 2

[Raycoms]

The problem seems to be an incompatibility with musl