-pkg := ctsim
-prefix := debian/$(pkg)
-DESTDIR := `pwd`/$(prefix)
-SHAREDOCDIR := $(DESTDIR)/usr/share/doc/$(pkg)
-SHAREDATADIR := $(DESTDIR)/usr/share/$(pkg)/.
+host_arch := $(shell dpkg-architecture -qDEB_HOST_ARCH)
+
+pkg := ctsim
+pkg-p4 := ctsim-pentium4
+pkg-p3 := ctsim-pentium3
+pkg-athlon := ctsim-athlon
+pkg-help := ctsim-help
+pkg-doc := ctsim-doc
+
+ctsim-shared := usr/share/ctsim
+
+prefix := debian/$(pkg)
+prefix-p4 := debian/$(pkg-p4)
+prefix-p3 := debian/$(pkg-p3)
+prefix-athlon := debian/$(pkg-athlon)
+prefix-help := debian/$(pkg-help)
+prefix-doc := debian/$(pkg-doc)
+
+DESTDIR := `pwd`/$(prefix)
+DESTDIR-P4 := `pwd`/$(prefix-p4)
+DESTDIR-P3 := `pwd`/$(prefix-p3)
+DESTDIR-ATHLON := `pwd`/$(prefix-athlon)
+HELPDIR := `pwd`/$(prefix-help)/$(ctsim-shared)
+doc-dir := usr/share/doc/$(pkg-doc)
+pixmap-dir := usr/X11R6/include/X11/pixmaps