Hardcode a different regex engine
diff --git a/build.yaml b/build.yaml
index f2021db..a872c40 100644
--- a/build.yaml
+++ b/build.yaml
@@ -3588,7 +3588,7 @@
     CPPFLAGS: -g -Wall -Wextra -Werror -Wno-long-long -Wno-unused-parameter
     LDFLAGS: -g
   google_benchmark:
-    CPPFLAGS: -Ithird_party/google_benchmark/include -DHAVE_STD_REGEX
+    CPPFLAGS: -Ithird_party/google_benchmark/include -DHAVE_POSIX_REGEX
   zlib:
     CFLAGS: -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-implicit-function-declaration
       $(W_NO_SHIFT_NEGATIVE_VALUE) -fvisibility=hidden