https://bugs.gentoo.org/730096
--- a/vpi/Makefile.in	2022-04-25 18:39:03.748939186 +0800
+++ b/vpi/Makefile.in	2022-04-25 18:38:43.754679053 +0800
@@ -71,7 +71,7 @@
 M = sys_clog2.o v2005_math.o
 
 # Object files for va_math.vpi
-V = va_math.o
+override V = va_math.o
 
 V2009 = v2009_table.o v2009_array.o v2009_enum.o v2009_string.o