diff --git a/CMakeLists.txt b/CMakeLists.txt
index 88c37cc2..407a0f47 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -428,17 +428,15 @@ set(CMAKE_REQUIRED_FLAGS "${_sta_fmt_check_saved_flags}")
 if(HAVE_CXX_STD_FORMAT)
   message(STATUS "std::format: available")
 else()
-  # Set the fmt dir for the ubuntu/centos docker files.
-  if(EXISTS "/usr/local/lib/cmake/fmt/fmt-config.cmake")
-    set(fmt_DIR "/usr/local/lib/cmake/fmt")
-  elseif(EXISTS "/usr/lib/x86_64-linux-gnu/cmake/fmt/fmt-config.cmake")
-    set(fmt_DIR "/usr/lib/x86_64-linux-gnu/cmake/fmt")
-  elseif(EXISTS "/usr/lib/aarch64-linux-gnu/cmake/fmt/fmt-config.cmake")
-    set(fmt_DIR "/usr/lib/aarch64-linux-gnu/cmake/fmt")
-  endif()
-  find_package(fmt QUIET)
-  if(fmt_FOUND)
-    message(STATUS "std::format: using installed fmt library")
+  # Use spdlog's bundled fmt when available to avoid ODR violations.
+  find_package(spdlog QUIET)
+  if(spdlog_FOUND)
+    message(STATUS "std::format: using spdlog's bundled fmt")
+    set(STA_USE_SPDLOG_FMT TRUE)
+    get_target_property(_spdlog_inc spdlog::spdlog INTERFACE_INCLUDE_DIRECTORIES)
+    set(_fmt_dir "${CMAKE_CURRENT_BINARY_DIR}/_spdlog_fmt")
+    file(MAKE_DIRECTORY "${_fmt_dir}")
+    file(CREATE_LINK "${_spdlog_inc}/spdlog/fmt/bundled" "${_fmt_dir}/fmt" SYMBOLIC)
   else()
     message(STATUS "std::format: building fmt library")
     include(FetchContent)
@@ -571,7 +569,12 @@ target_link_libraries(OpenSTA
   )
 
 if(NOT HAVE_CXX_STD_FORMAT)
-  target_link_libraries(OpenSTA fmt::fmt)
+  if(STA_USE_SPDLOG_FMT)
+    target_include_directories(OpenSTA PUBLIC "${_fmt_dir}")
+    target_link_libraries(OpenSTA spdlog::spdlog)
+  else()
+    target_link_libraries(OpenSTA fmt::fmt)
+  endif()
 endif()
 
 if (ZLIB_LIBRARIES)