I think boost needs to be linked.

Author: davidgiven

.github/workflows/ccpp.yml

@@ -66,6 +66,7 @@ jobs:
     - name: brew
       run: |
         brew install sqlite pkg-config libusb protobuf wxwidgets fmt make coreutils dylibbundler libjpeg libmagic nlohmann-json cli11 boost glfw3 md4c ninja python freetype2 mbedtls
+        brew link boost
         brew upgrade
     - name: make
       run: gmake -C fluxengine