the macos CI is wasting more of my time again

.github/workflows/build_all.yml

@@ -97,7 +97,7 @@ jobs:
           run: rm -f /usr/local/bin/2to3* /usr/local/bin/idle3* /usr/local/bin/pydoc3* /usr/local/bin/python3* /usr/local/bin/python3-config* && brew reinstall gettext
 
         - name: Install dependencies
-          run: brew install libusb fftw glfw airspy airspyhf portaudio hackrf rtl-sdr libbladerf codec2 zstd && pip3 install mako
+          run: brew install pkg-config libusb fftw glfw airspy airspyhf portaudio hackrf rtl-sdr libbladerf codec2 zstd && pip3 install mako
 
         - name: Install volk
           run: git clone --recursive https://github.com/gnuradio/volk && cd volk && mkdir build && cd build && cmake -DCMAKE_BUILD_TYPE=Release .. && make -j3 && sudo make install && cd ../../