--- PARPACK/SRC/MPI/Makefile.am.orig	2023-02-11 06:56:54.000000000 -0600
+++ PARPACK/SRC/MPI/Makefile.am	2023-02-24 13:39:50.000000000 -0600
@@ -30,7 +30,7 @@
 
 noinst_LTLIBRARIES = libparpack@LIBSUFFIX@@ITF64SUFFIX@_noopt.la
 libparpack@LIBSUFFIX@@ITF64SUFFIX@_noopt_la_SOURCES = pslamch10.f pdlamch10.f
-libparpack@LIBSUFFIX@@ITF64SUFFIX@_noopt_la_FFLAGS = -O0
+libparpack@LIBSUFFIX@@ITF64SUFFIX@_noopt_la_FFLAGS = -O0 @MACPORTS_ARCH_FLAGS@
 
 lib_LTLIBRARIES = libparpack@LIBSUFFIX@@ITF64SUFFIX@.la
 libparpack@LIBSUFFIX@@ITF64SUFFIX@_la_SOURCES = $(PSRC) $(SSRC) $(DSRC) $(CSRC) $(ZSRC)