force path manually

travis/build-wheels.sh

@@ -7,6 +7,7 @@ export PYTHON_VERSION=${PYTHON_VERSION/./}
 echo 'PYTHON_VERSION: '$PYTHON_VERSION
 
 ENABLE_CONTRIB=$(<contrib.enabled)
+ninja_path=$(readlink -f ninja)
 
 source travis/install-ninja.sh
 
@@ -48,7 +49,7 @@ for PYBIN in /opt/python/cp$PYTHON_VERSION*/bin; do
 
     if [[ $PYTHON_VERSION == 2* ]] && [[ $ENABLE_CONTRIB == 1 ]]; then
       echo 'Config for Py2'
-      cmake28 -H"." -B"build" -GNinja -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules -DCMAKE_BUILD_TYPE=Release -DBUILD_opencv_python3=OFF -DBUILD_opencv_java=OFF -DBUILD_SHARED_LIBS=OFF \
+      cmake28 -H"." -B"build" -D"CMAKE_MAKE_PROGRAM:PATH=$ninja_path" -GNinja -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules -DCMAKE_BUILD_TYPE=Release -DBUILD_opencv_python3=OFF -DBUILD_opencv_java=OFF -DBUILD_SHARED_LIBS=OFF \
         -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DWITH_IPP=OFF -DBUILD_DOCS=OFF \
         -DPYTHON2INTERP_FOUND=ON -DPYTHON2LIBS_FOUND=ON \
         -DPYTHON2_EXECUTABLE=$PYBIN/python \