I couldn't test this, since it died partway through the build, but

it should fix the install.  I did a partial test (which turned-out
to be a good thing) of a partial build, and it worked, at least...

lang/modula-3/Makefile

@@ -3,7 +3,7 @@
 # Date created:		18 Mar 1996
 # Whom:			John Polstra <jdp@polstra.com>
 #
-# $Id: Makefile,v 1.20 1998/06/06 20:31:52 jdp Exp $
+# $Id: Makefile,v 1.21 1998/06/27 05:19:10 asami Exp $
 #
 
 DISTNAME=	modula-3-3.6
@@ -54,6 +54,10 @@ do-install:
 	    sed -e "/^@/d" -e "/m3build-/d" -e "s/\.gz$$//" \
 		-e "/^share/d" ${PLIST} | \
 		cpio -dump -R ${BINOWN}.${BINGRP} ${PREFIX}
+	@cd ${temp_prefix}/man/man1; \
+	    umask 022; \
+	    ${ECHO} ${MAN1} | perl -pe 's/ /\n/g' | \
+		cpio -dump -R ${MANOWN}.${MANGRP} ${PREFIX}/man/man1
 	@echo "Fixing absolute pathnames in installed files"
 	@${SH} ${SCRIPTDIR}/fix_pathnames ${temp_prefix} ${PREFIX}
 	@echo "Rebuilding and shipping m3build with correct pathnames"