diff --git a/cmake/MatrixStructs.cmake b/cmake/MatrixStructs.cmake
index 447deecf..79a54350 100644
--- a/cmake/MatrixStructs.cmake
+++ b/cmake/MatrixStructs.cmake
@@ -18,7 +18,7 @@ ExternalProject_Add(
   BUILD_IN_SOURCE 1
   SOURCE_DIR ${MATRIX_STRUCTS_ROOT}
   CONFIGURE_COMMAND ${CMAKE_COMMAND} -DCMAKE_BUILD_TYPE=Release ${MATRIX_STRUCTS_ROOT}
-  BUILD_COMMAND ${CMAKE_COMMAND} --build ${MATRIX_STRUCTS_ROOT}
+  BUILD_COMMAND ${CMAKE_COMMAND} --build ${MATRIX_STRUCTS_ROOT} --config Release
   INSTALL_COMMAND ""
 )