fix linux builds

scripts/build.sh

@@ -1,4 +1,16 @@
 
-cmake -S . -B build -G Ninja \
-    -DCMAKE_PREFIX_PATH=build/lib
+PROJECT_ROOT=${PWD}
+BUILD_DIR=${PROJECT_ROOT}/build
+LIB_ROOT=${BUILD_DIR}/lib
+
+# libraries
+RTAUDIO_ROOT=${LIB_ROOT}/rtaudio
+RTMIDI_ROOT=${LIB_ROOT}/rtmidi
+YAMLCPP_ROOT=${LIB_ROOT}/yaml-cpp
+
+cmake -S . -B ${BUILD_DIR} -G Ninja \
+    -DRtAudio_DIR="${RTAUDIO_ROOT}/share/rtaudio" \
+    -DRtMidi_DIR="${RTMIDI_ROOT}/share/rtmidi" \
+    -Dyaml-cpp_DIR="${YAMLCPP_ROOT}/lib/cmake/yaml-cpp" 
+
 cmake --build build

scripts/install_dependencies.sh

@@ -23,6 +23,7 @@ mkdir ${BUILD_LIB_DIR}/rtmidi -p
 cd ${PROJECT_ROOT}/lib/rtmidi
 cmake -S . -B build -G Ninja \
     -DRTMIDI_BUILD_SHARED_LIBS=ON \
+    -DRTMIDI_API_ALSA=ON \
     -DCMAKE_BUILD_TYPE=Release
 cmake --build build
 cmake --install build --prefix ${BUILD_LIB_DIR}/rtmidi