diff --git a/.travis/build.sh b/.travis/build.sh
index 2117f7b1e..72cfbbe4d 100755
--- a/.travis/build.sh
+++ b/.travis/build.sh
@@ -3,6 +3,6 @@
 set -x
 
 conan install .. --build missing
-cmake -G Ninja -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DBUILD_TESTING=ON .. || exit 1
+cmake -G Ninja -DCMAKE_BUILD_TYPE=$BUILD_TYPE $EXTRA_CMAKE_FLAGS -DBUILD_TESTING=ON .. || exit 1
 cmake --build . -- -v || exit 1
 ASAN_OPTIONS=alloc_dealloc_mismatch=0 ctest . || exit 1
diff --git a/.travis/os_build.sh b/.travis/os_build.sh
index c8e6a71a6..90ff8b0bb 100755
--- a/.travis/os_build.sh
+++ b/.travis/os_build.sh
@@ -8,5 +8,6 @@ fi
 
 if [ "$TRAVIS_OS_NAME" == "osx" ]; then
     cd _build_
+    export EXTRA_CMAKE_FLAGS=-DCMAKE_PREFIX_PATH='/usr/local/opt/qt5/;/usr/local/opt/openal-soft'
     ../.travis/build.sh
 fi