diff -uNr src/third_party/blake3/CMakeLists.txt src/third_party/blake3/CMakeLists.txt.mod
--- ./src/third_party/blake3/CMakeLists.txt	2021-05-10 00:09:46.000000000 +0530
+++ ./src/third_party/blake3/CMakeLists.txt.mod	2021-06-11 09:05:04.054571163 +0530
@@ -17,44 +17,7 @@
     set(compile_flags "${others_flags}")
   endif()
 
-  # First check if it's possible to use the assembler variant for the feature.
-  string(TOUPPER "have_asm_${feature}" have_feature)
-  if(NOT DEFINED "${have_feature}" AND CMAKE_SIZEOF_VOID_P EQUAL 8)
-    if(MSVC)
-      set(suffix "_x86-64_windows_msvc.asm")
-    elseif(WIN32)
-      set(suffix "_x86-64_windows_gnu.S")
-    else()
-      set(suffix "_x86-64_unix.S")
-    endif()
-
-    if(NOT CMAKE_REQUIRED_QUIET)
-      message(STATUS "Performing Test ${have_feature}")
-    endif()
-
-    set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
-
-    # Must set CMAKE_ASM_MASM_CREATE_STATIC_LIBRARY explicitly otherwise try_compile
-    # fails, see https://discourse.cmake.org/t/building-lib-file-from-asm-cmake-bug/1959
-    try_compile(
-      ${have_feature}
-      ${CMAKE_CURRENT_BINARY_DIR}
-      "${CMAKE_CURRENT_SOURCE_DIR}/blake3_${feature}${suffix}"
-      CMAKE_FLAGS -DCMAKE_ASM_MASM_CREATE_STATIC_LIBRARY=${CMAKE_C_CREATE_STATIC_LIBRARY}
-      COMPILE_DEFINITIONS ${compile_flags})
-
-    unset(CMAKE_TRY_COMPILE_TARGET_TYPE)
-
-    if(NOT CMAKE_REQUIRED_QUIET)
-      if (${${have_feature}})
-        message(STATUS "Performing Test ${have_feature} - Success")
-      else()
-        message(STATUS "Performing Test ${have_feature} - Failed")
-      endif()
-    endif()
-  endif()
-
-  # If the assembler variant didn't work, try the c variant.
+  # Force use the C variant
   if(NOT ${have_feature})
     string(TOUPPER "have_c_${feature}" have_feature)
     set(suffix ".c")