The suffix of the skeyprune man page should match its section.

Upstream-Status: Inappropriate [no upstream]

Index: Makefile.in
===================================================================
--- Makefile.in.orig
+++ Makefile.in
@@ -106,7 +106,7 @@ install: ${TARGETS}
 	${INSTALL_MAN} skeyinit.[01].out $(DESTDIR)$(mandir)/$(mansubdir)1/skeyinit.1
 	${INSTALL_MAN} skeyinfo.[01].out $(DESTDIR)$(mandir)/$(mansubdir)1/skeyinfo.1
 	${INSTALL_MAN} skeyaudit.[01].out $(DESTDIR)$(mandir)/$(mansubdir)1/skeyaudit.1
-	${INSTALL_MAN} skeyprune.[08].out $(DESTDIR)$(mandir)/$(mansubdir)8/skeyprune.1
+	${INSTALL_MAN} skeyprune.[08].out $(DESTDIR)$(mandir)/$(mansubdir)8/skeyprune.8
 	${TOUCH} ${DESTDIR}${sysconfdir}/skeykeys
 
 uninstallall: uninstall