diff --git a/cmake/nccl.cmake b/cmake/nccl.cmake
index cc1585b0fc..82cf3b4122 100644
--- a/cmake/nccl.cmake
+++ b/cmake/nccl.cmake
@@ -61,6 +61,10 @@ else()
   message(STATUS "Building NCCL from source")
   list(TRANSFORM CUDA_GENCODE PREPEND "NVCC_GENCODE=" OUTPUT_VARIABLE NCCL_BUILD_NVCC_GENCODE)
 
+  set(NCCL_BUILD_CMD make src.build "${NCCL_BUILD_NVCC_GENCODE}" "CUDA_HOME=${CUDA_TOOLKIT_ROOT_DIR}" "BUILDDIR=${CMAKE_BINARY_DIR}/deps/${NCCL_NAME}")
+  if(DEFINED ENV{MAKEFLAGS})
+    set(NCCL_BUILD_CMD ${CMAKE_COMMAND} -E env MAKEFLAGS=$ENV{MAKEFLAGS} ${NCCL_BUILD_CMD})
+  endif()
   ExternalProject_Add(${NCCL_NAME}
     SOURCE_DIR ${PROJECT_SOURCE_DIR}/deps/${NCCL_NAME}
     PREFIX ${CMAKE_BINARY_DIR}/deps/${NCCL_NAME}
@@ -68,7 +72,7 @@ else()
     BUILD_BYPRODUCTS ${CMAKE_BINARY_DIR}/deps/${NCCL_NAME}/lib/libnccl${LIBEXT}
     INSTALL_COMMAND ""
     CONFIGURE_COMMAND ""
-    BUILD_COMMAND make src.build "${NCCL_BUILD_NVCC_GENCODE}" "CUDA_HOME=${CUDA_TOOLKIT_ROOT_DIR}" "BUILDDIR=${CMAKE_BINARY_DIR}/deps/${NCCL_NAME}"
+    BUILD_COMMAND ${NCCL_BUILD_CMD}
     BUILD_IN_SOURCE 1
   )