diff -Naur htmldoc-1.8.29-old/Makefile.in htmldoc-1.8.29/Makefile.in
--- htmldoc-1.8.29-old/Makefile.in	2011-12-23 08:23:11.000000000 +0200
+++ htmldoc-1.8.29/Makefile.in	2017-03-01 00:17:10.552174308 +0200
@@ -16,6 +16,10 @@
 
 include Makedefs
 
+#
+# DESTDIR support...
+#
+DESTDIR ?= /
 
 #
 # Software packaging...
@@ -77,7 +81,7 @@
 	$(MAKE) all
 	for dir in $(INSTALLDIRS); do\
 		echo Installing in $$dir...;\
-		(cd $$dir; $(MAKE) -$(MAKEFLAGS) install) || break;\
+		$(MAKE) install -C $$dir ; \
 	done
 
 
diff -Naur htmldoc-1.8.29-old/data/Makefile htmldoc-1.8.29/data/Makefile
--- htmldoc-1.8.29-old/data/Makefile	2011-12-23 08:23:11.000000000 +0200
+++ htmldoc-1.8.29/data/Makefile	2017-03-01 00:08:14.497536333 +0200
@@ -16,6 +16,10 @@
 
 include ../Makedefs
 
+#
+# DESTDIR support...
+#
+DESTDIR ?= /
 
 #
 # Character set/glyph files...
@@ -41,11 +45,11 @@
 #
 
 install:
-	if [ ! -d $(datadir)/htmldoc/data ]; then\
-		$(MKDIR) $(datadir)/htmldoc/data;\
+	if [ ! -d $(DESTDIR)$(datadir)/htmldoc/data ]; then\
+		$(MKDIR) $(DESTDIR)$(datadir)/htmldoc/data;\
 	fi
-	$(CP) $(FILES) $(datadir)/htmldoc/data
-	$(CHMOD) ugo+r $(datadir)/htmldoc/data/*
+	$(CP) $(FILES) $(DESTDIR)$(datadir)/htmldoc/data
+	$(CHMOD) ugo+r $(DESTDIR)$(datadir)/htmldoc/data/*
 
 
 #
diff -Naur htmldoc-1.8.29-old/doc/Makefile htmldoc-1.8.29/doc/Makefile
--- htmldoc-1.8.29-old/doc/Makefile	2016-01-03 00:58:41.000000000 +0200
+++ htmldoc-1.8.29/doc/Makefile	2017-03-01 00:08:39.842424836 +0200
@@ -16,6 +16,10 @@
 
 include ../Makedefs
 
+#
+# DESTDIR support...
+#
+DESTDIR ?= /
 
 #
 # Documentation files...
@@ -45,16 +49,16 @@
 #
 
 install: $(DOCUMENTS)
-	if test ! -d $(datadir)/doc/htmldoc; then\
-		$(MKDIR) $(datadir)/doc/htmldoc;\
+	if test ! -d $(DESTDIR)$(datadir)/doc/htmldoc; then\
+		$(MKDIR) $(DESTDIR)$(datadir)/doc/htmldoc;\
 	fi
-	$(CP) $(DOCFILES) $(datadir)/doc/htmldoc
-	$(CHMOD) ugo+r $(datadir)/doc/htmldoc/*
-	if test ! -d $(mandir)/man1; then\
-		$(MKDIR) $(mandir)/man1;\
+	$(CP) $(DOCFILES) $(DESTDIR)$(datadir)/doc/htmldoc
+	$(CHMOD) ugo+r $(DESTDIR)$(datadir)/doc/htmldoc/*
+	if test ! -d $(DESTDIR)$(mandir)/man1; then\
+		$(MKDIR) $(DESTDIR)$(mandir)/man1;\
 	fi
-	$(CP) htmldoc.man $(mandir)/man1/htmldoc.1
-	$(CHMOD) ugo+r $(mandir)/man1/htmldoc.1
+	$(CP) htmldoc.man $(DESTDIR)$(mandir)/man1/htmldoc.1
+	$(CHMOD) ugo+r $(DESTDIR)$(mandir)/man1/htmldoc.1
 
 
 #
diff -Naur htmldoc-1.8.29-old/fonts/Makefile htmldoc-1.8.29/fonts/Makefile
--- htmldoc-1.8.29-old/fonts/Makefile	2011-12-23 08:23:11.000000000 +0200
+++ htmldoc-1.8.29/fonts/Makefile	2017-03-01 00:07:49.053648245 +0200
@@ -16,6 +16,10 @@
 
 include ../Makedefs
 
+#
+# DESTDIR support..
+#
+DESTDIR ?= /
 
 #
 # Standard fonts...
@@ -62,15 +66,15 @@
 #
 
 install:
-	echo "Installing font files in $(datadir)/htmldoc/fonts..."
-	if [ ! -d $(datadir)/htmldoc/fonts ]; then\
-		$(MKDIR) $(datadir)/htmldoc/fonts;\
+	echo "Installing font files in $(DESTDIR)$(datadir)/htmldoc/fonts..."
+	if [ ! -d $(DESTDIR)$(datadir)/htmldoc/fonts ]; then\
+		$(MKDIR) $(DESTDIR)$(datadir)/htmldoc/fonts;\
 	fi
 	for font in $(FONTS); do \
-		$(CP) $$font.afm $(datadir)/htmldoc/fonts; \
-		$(CP) $$font.pfa $(datadir)/htmldoc/fonts; \
+		$(CP) $$font.afm $(DESTDIR)$(datadir)/htmldoc/fonts; \
+		$(CP) $$font.pfa $(DESTDIR)$(datadir)/htmldoc/fonts; \
 	done
-	$(CHMOD) ugo+r $(datadir)/htmldoc/fonts/*
+	$(CHMOD) ugo+r $(DESTDIR)$(datadir)/htmldoc/fonts/*
 
 
 #
diff -Naur htmldoc-1.8.29-old/htmldoc/Makefile htmldoc-1.8.29/htmldoc/Makefile
--- htmldoc-1.8.29-old/htmldoc/Makefile	2016-01-02 23:46:20.000000000 +0200
+++ htmldoc-1.8.29/htmldoc/Makefile	2017-03-01 00:09:01.478329642 +0200
@@ -16,6 +16,10 @@
 
 include ../Makedefs
 
+#
+# DESTDIR support...
+#
+DESTDIR ?= /
 
 #
 # Object files...
@@ -38,11 +42,11 @@
 #
 
 install:	all
-	if [ ! -d $(bindir) ]; then\
-		$(MKDIR) $(bindir);\
+	if [ ! -d $(DESTDIR)$(bindir) ]; then\
+		$(MKDIR) $(DESTDIR)$(bindir);\
 	fi
-	cp htmldoc$(EXEEXT) $(bindir)
-	chmod ugo+rx $(bindir)/htmldoc$(EXEEXT)
+	cp htmldoc$(EXEEXT) $(DESTDIR)$(bindir)
+	chmod ugo+rx $(DESTDIR)$(bindir)/htmldoc$(EXEEXT)
 
 
 #
diff -Naur htmldoc-1.8.29-old/jpeg/Makefile htmldoc-1.8.29/jpeg/Makefile
--- htmldoc-1.8.29-old/jpeg/Makefile	2011-12-29 07:59:47.000000000 +0200
+++ htmldoc-1.8.29/jpeg/Makefile	2017-03-01 00:09:44.750139212 +0200
@@ -13,6 +13,11 @@
 include ../Makedefs
 
 #
+# DESTDIR support...
+#
+DESTDIR ?= /
+
+#
 # Object files...
 #
 
diff -Naur htmldoc-1.8.29-old/png/Makefile htmldoc-1.8.29/png/Makefile
--- htmldoc-1.8.29-old/png/Makefile	2011-12-29 08:00:22.000000000 +0200
+++ htmldoc-1.8.29/png/Makefile	2017-03-01 00:10:04.295053181 +0200
@@ -13,6 +13,11 @@
 include ../Makedefs
 
 #
+# DESTDIR support...
+#
+DESTDIR ?= /
+
+#
 # Object files...
 #
 
diff -Naur htmldoc-1.8.29-old/zlib/Makefile htmldoc-1.8.29/zlib/Makefile
--- htmldoc-1.8.29-old/zlib/Makefile	2011-12-29 08:01:42.000000000 +0200
+++ htmldoc-1.8.29/zlib/Makefile	2017-03-01 00:10:29.601941772 +0200
@@ -13,6 +13,11 @@
 include ../Makedefs
 
 #
+# DESTDIR support...
+#
+DESTDIR ?= /
+
+#
 # Object files...
 #