Fix install dir

.ci/install

@@ -47,7 +47,7 @@ mkdir $BUILD_PATH && cd $BUILD_PATH
 echo "cmake $CMAKE_FLAGS $SOURCEDIR"
 eval cmake $CMAKE_FLAGS $SOURCEDIR
 
-cmake --build $BUILDDIR --target install
-rm -rf $BUILDDIR
+cmake --build $BUILD_PATH --target install
+rm -rf $BUILD_PATH
 
 trap cleanup EXIT