diff --git a/math/hmat-oss/files/patch-CMakeLists.txt b/math/hmat-oss/files/patch-CMakeLists.txt
new file mode 100644
index 000000000000..250754940b7a
--- /dev/null
+++ b/math/hmat-oss/files/patch-CMakeLists.txt
@@ -0,0 +1,14 @@
+--- CMakeLists.txt.orig	2022-10-05 15:44:52 UTC
++++ CMakeLists.txt
+@@ -255,9 +255,9 @@ include(CheckCCompilerFlag)
+ include(CheckCXXCompilerFlag)
+ 
+ function(hmat_set_compiler_flags _TARGET_NAME)
+-    check_cxx_compiler_flag("-Werror -Wall" HAVE_COMPILER_WARNING_FLAGS)
++    check_cxx_compiler_flag("-Wall" HAVE_COMPILER_WARNING_FLAGS)
+     if(HAVE_COMPILER_WARNING_FLAGS)
+-        target_compile_options(${_TARGET_NAME} PRIVATE -Werror -Wall)
++        target_compile_options(${_TARGET_NAME} PRIVATE -Wall)
+         foreach(flag -Wno-sign-compare;-Wno-undefined-var-template;-Wno-unused-parameter)
+             string(REPLACE "-" "_" varname ${flag})
+             check_cxx_compiler_flag("${flag}" CXX${varname})