diff -ru nbsdsrc/src/lib/libm/Makefile lib/nbsd_libm/Makefile
--- nbsdsrc/src/lib/libm/Makefile
+++ lib/nbsd_libm/Makefile
@@ -13,6 +13,10 @@
 #
 #
 
+.if ${MACHINE_ARCH} == "unknown"
+MACHINE_ARCH:= ${MACHINE}
+.endif
+
 #
 # There are two options in making libm at fdlibm compile time:
 # 	_IEEE_LIBM 	--- IEEE libm; smaller, and somewhat faster
diff -ru nbsdsrc/src/lib/libm/arch/i387/fenv.c lib/nbsd_libm/arch/i387/fenv.c
--- nbsdsrc/src/lib/libm/arch/i387/fenv.c
+++ lib/nbsd_libm/arch/i387/fenv.c
@@ -122,8 +122,10 @@
 	size_t oldlen = sizeof(__HAS_SSE);
 	int rv;
 
+#ifndef __minix
 	rv = sysctlbyname("machdep.sse", &__HAS_SSE, &oldlen, NULL, 0);
 	if (rv == -1)
+#endif
 		__HAS_SSE = 0;
 }