Index: Portfile
===================================================================
--- Portfile	(revision 65257)
+++ Portfile	(working copy)
@@ -35,6 +34,12 @@
 			--with-tiff=${prefix} \
 			--with-zlib=${prefix}
 
+post-build {
+	reinplace -E {s|-arch [a-z0-9_]+||g} \
+		${worksrcpath}/simage.pc \
+		${worksrcpath}/simage-default.cfg
+}
+
 # The QuickTime variant uses QuickTime for image loading, removing
 # the dependencies on additional image libraries.
 variant quicktime {