Index: Makefile.in
--- Makefile.in.orig
+++ Makefile.in
@@ -22,10 +22,10 @@ prefix = ${DESTDIR}@prefix@
 exec_prefix = @exec_prefix@
 bindir = @bindir@
 datarootdir = @datarootdir@
-mandir = @mandir@
+mandir = ${DESTDIR}@mandir@
 man1dir = $(mandir)/man1
 
-CFLAGS = @CFLAGS@ -I@srcdir@ -I@builddir@ -Werror
+CFLAGS = @CFLAGS@ -I@srcdir@ -I@builddir@
 LDFLAGS = @LDFLAGS@
 LIBS = @LIBS@
 
@@ -65,7 +65,7 @@ install-strip: STRIPFLAGS = -s
 install install-strip: $(PROGRAM)
 	@MKDIR_P@ $(bindir) $(man1dir)
 	@INSTALL@ -m 755 $(STRIPFLAGS) $(PROGRAM) $(bindir)/
-	@INSTALL@ -m 644 $(MANPAGE) $(man1dir)/
+	@INSTALL@ -m 644 @srcdir@/$(MANPAGE) $(man1dir)/
 
 
 uninstall:
@@ -100,7 +100,7 @@ tar:
 	 tar zcf $(PWD)/$(PACKAGE)-$(VERSION).tar.gz $(PACKAGE)-$(VERSION))
 	rm -rf $(STAGING)
 
-include debian/Makefile.pkgdeb
+include @srcdir@/debian/Makefile.pkgdeb
 
 
 config.rng.h: @srcdir@/config.rng
